1

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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                            ------------------------

                                   FORM 10-Q

                            ------------------------

(MARK ONE)

     [X]   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
           EXCHANGE ACT OF 1934

                  FOR THE QUARTERLY PERIOD ENDED JULY 1, 2001

                                       OR

     [ ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
           EXCHANGE ACT OF 1934

         FOR THE TRANSITION PERIOD FROM ____________ TO ____________ .

                         COMMISSION FILE NUMBER 0-23298

                            ------------------------

                               QLOGIC CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

<Table>
                                            
                   DELAWARE                                      33-0537669
       (STATE OR OTHER JURISDICTION OF                        (I.R.S. EMPLOYER
        INCORPORATION OR ORGANIZATION)                      IDENTIFICATION NO.)

           26600 LAGUNA HILLS DRIVE
           ALISO VIEJO, CALIFORNIA                                 92656
   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                      (ZIP CODE)
</Table>

                                 (949) 389-6000
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)

                            ------------------------

     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes [X]  No [ ]

     As of July 31, 2001, the registrant had 92,546,888 shares of common stock
outstanding. All references to share and per share data for all periods
presented have been restated for stock splits.

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   2

                               QLOGIC CORPORATION

                                     INDEX

<Table>
<Caption>
                                                                       PAGE
                                                                       ----
                                                                 
PART I. FINANCIAL INFORMATION
Item 1.  Financial Statements
         Condensed Consolidated Balance Sheets at July 1, 2001 and
         April 1, 2001...............................................    1
         Condensed Consolidated Statements of Income for the three
         months ended July 1, 2001 and July 2, 2000..................    2
         Condensed Consolidated Statements of Cash Flows for the
         three months ended July 1, 2001 and July 2, 2000............    3
         Notes to Condensed Consolidated Financial Statements........    4
Item 2.  Management's Discussion and Analysis of Financial Condition
         and Results of Operations...................................    6
Item 3.  Quantitative and Qualitative Disclosures About Market
         Risk........................................................   16

PART II. OTHER INFORMATION
Item 6.  Exhibits and Reports On Form 8-K............................   17
</Table>

                                        i
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                         PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

                               QLOGIC CORPORATION

                     CONDENSED CONSOLIDATED BALANCE SHEETS
                       (IN THOUSANDS, EXCEPT SHARE DATA)

                                     ASSETS

<Table>
<Caption>
                                                                JULY 1,      APRIL 1,
                                                                 2001          2001
                                                              -----------    --------
                                                              (UNAUDITED)
                                                                       
Cash and cash equivalents...................................   $112,798      $128,273
Short term investments......................................    266,947       227,210
Accounts and notes receivable, less allowance for doubtful
  accounts of $2,672 and $2,372 as of July 1, 2001 and April
  1, 2001, respectively.....................................     51,633        53,588
Inventories.................................................     46,854        46,510
Deferred income taxes.......................................     30,310        32,558
Prepaid expenses and other current assets...................      2,735         2,358
                                                               --------      --------
          Total current assets..............................    511,277       490,497
Property and equipment, net.................................     57,156        56,843
Other assets................................................     25,789        24,157
                                                               --------      --------
                                                               $594,222      $571,497
                                                               ========      ========
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable............................................   $ 12,507      $ 18,017
Accrued compensation........................................     11,678        15,413
Accrued warranty............................................      2,939         2,887
Income taxes payable........................................     10,663         6,295
Other accrued liabilities...................................      7,584         5,183
                                                               --------      --------
          Total current liabilities.........................     45,371        47,795
                                                               --------      --------
Commitments and contingencies
Stockholders' equity:
  Preferred stock, $0.001 par value; 1,000,000 shares
     authorized, (200,000 shares designated as Series A
     Junior Participating Preferred, $0.001 par value); none
     issued and outstanding.................................         --            --
  Common stock, $0.001 par value; 500,000,000 shares
     authorized, 92,469,565 and 92,324,042 issued and
     outstanding at July 1, 2001 and April 1, 2001,
     respectively...........................................         92            92
  Additional paid-in capital................................    398,961       393,383
  Deferred stock-based compensation.........................     (5,180)       (5,751)
  Retained earnings.........................................    153,434       134,254
  Accumulated other comprehensive income....................      1,544         1,724
                                                               --------      --------
          Total stockholders' equity........................    548,851       523,702
                                                               --------      --------
                                                               $594,222      $571,497
                                                               ========      ========
</Table>

          See accompanying notes to consolidated financial statements.
                                        1
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                               QLOGIC CORPORATION

                 CONDENSED CONSOLIDATED STATEMENTS OF INCOME(1)
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
                                  (UNAUDITED)

<Table>
<Caption>
                                                              THREE MONTHS ENDED
                                                              ------------------
                                                              JULY 1,    JULY 2,
                                                               2001       2000
                                                              -------    -------
                                                                   
Gross revenues..............................................  $92,062    $77,402
Sales discounts.............................................    2,161        629
                                                              -------    -------
Net revenues................................................   89,901     76,773
Cost of revenues............................................   34,311     26,588
                                                              -------    -------
          Gross profit......................................   55,590     50,185
                                                              -------    -------
Operating expenses:
  Engineering and development...............................   17,397     12,557
  Selling and marketing.....................................   10,157      8,346
  General and administrative................................    4,432      3,433
                                                              -------    -------
          Total operating expenses..........................   31,986     24,336
                                                              -------    -------
Operating income............................................   23,604     25,849
Interest income, net........................................    5,106      3,822
                                                              -------    -------
Income before income taxes..................................   28,710     29,671
Income tax provision........................................  $ 9,530    $10,047
                                                              -------    -------
Net income..................................................  $19,180    $19,624
                                                              =======    =======
Net income per share:
  Basic.....................................................  $  0.21    $  0.22
                                                              -------    -------
  Diluted...................................................  $  0.20    $  0.21
                                                              -------    -------
Number of shares used in per share calculations:
  Basic.....................................................   92,399     90,129
                                                              -------    -------
  Diluted...................................................   94,862     95,027
                                                              -------    -------
</Table>

- ---------------
(1) The condensed consolidated statement of income for the period ended July 2,
    2000 has been restated to give retroactive effect to the August 1, 2000
    merger accounted for using the pooling-of-interests method.

     See accompanying notes to condensed consolidated financial statements.
                                        2
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                               QLOGIC CORPORATION

               CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS(1)
                                 (IN THOUSANDS)
                                  (UNAUDITED)

<Table>
<Caption>
                                                               THREE MONTHS ENDED
                                                              ---------------------
                                                               JULY 1,     JULY 2,
                                                                2001         2000
                                                              ---------    --------
                                                                     
Cash flows from operating activities:
  Net income................................................  $  19,180    $ 19,624
  Adjustments to reconcile net income to net cash provided
     by operating activities:
     Provision for non-cash sales discounts.................      2,161         629
     Depreciation and amortization..........................      2,712       2,318
     Increase in allowance for doubtful accounts............        300          64
     Amortization of deferred stock-based compensation......        571          --
     Loss on disposal of property and equipment.............         30          83
     Provision for deferred income taxes....................      3,380          55
     Tax benefit from issuance of stock under employee stock
      plans.................................................      1,563         615
  Changes in assets and liabilities:
     Accounts and notes receivable..........................      1,655        (422)
     Inventories............................................       (344)      2,026
     Prepaid expenses and other current assets..............       (377)       (138)
     Other assets...........................................       (118)       (909)
     Accounts payable.......................................     (5,510)        313
     Accrued compensation...................................     (3,735)     (2,118)
     Incomes taxes payable..................................      4,368       8,904
     Accrued warranty.......................................         52         417
     Other accrued liabilities..............................      2,401         344
     Other non-current liabilities..........................         --          (6)
                                                              ---------    --------
          Net cash provided by operating activities.........     28,289      31,799
                                                              ---------    --------
Cash flows from investing activities:
  Additions to property and equipment.......................     (2,701)     (5,896)
  Purchases of investments..................................   (112,217)    (66,902)
  Maturities of investments.................................     72,300      34,493
  Purchase of equity investment.............................     (3,000)         --
  Other, net................................................         --          30
                                                              ---------    --------
          Net cash used in investing activities.............    (45,618)    (38,275)
                                                              ---------    --------
Cash flows from financing activities:
  Principal payments on other non-current liabilities.......         --          (6)
  Proceeds from issuance of stock under employee stock
     plans..................................................      1,854       2,252
                                                              ---------    --------
          Net cash provided by financing activities.........      1,854       2,246
                                                              ---------    --------
Net decrease in cash and cash equivalents...................    (15,475)     (4,230)
Cash and cash equivalents at beginning of period............    128,273      86,889
                                                              ---------    --------
Cash and cash equivalents at end of period..................  $ 112,798    $ 82,659
                                                              =========    ========
Supplemental disclosure of cash flow information:
Cash paid during the year for:
  Interest..................................................  $      16    $     12
                                                              =========    ========
  Income taxes..............................................  $     127    $     19
                                                              =========    ========
Supplemental disclosure of non-cash investing and financing
  activities:
  Accrual for acquisition performance payment...............  $     385    $    218
                                                              =========    ========
</Table>

- ---------------
(1) The condensed consolidated statement of cash flows for the period ended July
    2, 2000 has been restated to give retroactive effect to the August 1, 2000
    merger accounted for using the pooling-of-interests method.

     See accompanying notes to condensed consolidated financial statements.

                                        3
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                               QLOGIC CORPORATION

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

NOTE (1)  BASIS OF PRESENTATION

     In the opinion of management of QLogic Corporation ("QLogic" or the
"Company"), the accompanying unaudited condensed consolidated financial
statements contain all adjustments (which include normal recurring adjustments)
necessary to present fairly the Company's financial position as of July 1, 2001,
the statements of income for the three months ended July 1, 2001 and July 2,
2000 and the statements of cash flows for the three months ended July 1, 2001
and July 2, 2000. The accompanying condensed consolidated financial statements
should be read in conjunction with the consolidated financial statements in the
Company's Annual Report on Form 10-K for the year ended April 1, 2001. The
results of operations for the three months ended July 1, 2001 are not
necessarily indicative of the results to be expected for the entire fiscal year.
Certain items previously reported in specific financial statement captions have
been reclassified to conform to the current presentation. All references to
share and per share data have been retroactively restated to give effect to the
Company's stock splits.

NOTE (2)  INVENTORIES

     Components of inventories are as follows:

<Table>
<Caption>
                                                           JULY 1,    APRIL 1,
                                                            2001        2001
                                                           -------    --------
                                                             (IN THOUSANDS)
                                                                
Raw materials............................................  $40,096    $37,110
Work in process..........................................    5,373      8,021
Finished goods...........................................    1,385      1,379
                                                           -------    -------
                                                           $46,854    $46,510
                                                           =======    =======
</Table>

NOTE (3)  NET INCOME PER SHARE

     The Company computed basic net income per share based on the weighted
average number of common shares outstanding during the period presented. Diluted
net income per share was computed based on the weighted average number of common
and dilutive potential common shares outstanding during the periods presented.
The Company has granted certain stock options which have been treated as
dilutive potential common shares.

     The following table sets forth the computations of basic and diluted net
income per share:

<Table>
<Caption>
                                                            JULY 1,      JULY 2,
                                                             2001         2000
                                                           ---------    ---------
                                                           (IN THOUSANDS, EXCEPT
                                                             PER SHARE AMOUNTS)
                                                                  
Numerator:
  Net income.............................................   $19,180      $19,624
                                                            =======      =======
Denominator:
  Denominator for basic net income per share -- weighted
     average shares......................................    92,399       90,129
  Dilutive potential common shares, using treasury stock
     method..............................................     2,463        4,898
                                                            -------      -------
Denominator for diluted net income per share.............    94,862       95,027
                                                            =======      =======
Basic net income per share...............................   $  0.21      $  0.22
                                                            -------      -------
Diluted net income per share.............................   $  0.20      $  0.21
                                                            -------      -------
</Table>

     Options to purchase 3,523,409 and 690,059 shares of common stock with
exercise prices that exceed the average market price of $45.70 and $70.60 during
the three months ended July 1, 2001 and July 2, 2000,

                                        4
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                               QLOGIC CORPORATION

        NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

respectively, were excluded from the calculation of diluted net income per share
as their inclusion would have been anti-dilutive.

NOTE (4)  OTHER COMPREHENSIVE INCOME

     In the fiscal quarter ended October 1, 2000, the Company changed its
classification of certain investment securities from "held to maturity" to
"available for sale" according to the definitions of Financial Accounting
Standards No. 115 (SFAS No. 115). According to Financial Accounting Standards
No. 130 (SFAS No. 130), unrealized gains and losses from available for sale
securities require disclosure as a component of other comprehensive income. SFAS
No. 130 separates comprehensive income into two components: net income and other
comprehensive income. Other comprehensive income refers to revenue, expenses,
gains and losses that are recorded as an element of stockholders' equity, but
are excluded from net income. The Company's other comprehensive income is
comprised solely of unrealized gains and losses on marketable securities
categorized as "available for sale" under SFAS No. 115, net of income taxes. For
the three months ended July 2, 2000, there were no components of other
comprehensive income, therefore, net income is equal to total comprehensive
income. The components of total comprehensive income for the three-month period
ended July 1, 2001 were as follows:

<Table>
<Caption>
                                                          THREE MONTHS
                                                             ENDED
                                                          JULY 1, 2001
                                                         --------------
                                                         (IN THOUSANDS)
                                                      
Net income.............................................     $19,180
Other comprehensive income, net of tax:
  Unrealized gain (loss) on available for sale
     investments.......................................        (180)
                                                            -------
          Total comprehensive income...................     $19,000
                                                            =======
</Table>

                                        5
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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

     This Discussion and Analysis of Financial Condition and Results of
Operations contains descriptions of our expectations regarding future trends
affecting our business. These forward-looking statements and other
forward-looking statements made elsewhere in this report are made in reliance
upon safe harbor provisions of the Private Securities Litigation Reform Act of
1995. Our actual results could differ materially from those anticipated in these
forward-looking statements as a result of several factors, including, but not
limited to those factors set forth and discussed under "Factors That May Affect
Future Results" and elsewhere in this report, which include without limitation
the fact that our operating results fluctuate significantly, that our business
is dependent on the storage area network market that is new and unpredictable,
and that our financial condition will be materially harmed if we do not maintain
and gain market or industry acceptance of our products. Readers of this
Quarterly Report on Form 10-Q are urged to read those sections in their
entirety. In light of the significant uncertainties inherent in the
forward-looking information included in this document, the inclusion of
information should not be regarded as a representation by us or any other person
that our objectives or plans will be achieved. QLogic undertakes no obligation
to update or revise these forward-looking statements, whether as a result of new
information, future events or otherwise.

                             RESULTS OF OPERATIONS

     The following table sets forth, for the periods indicated, certain income
and expense items expressed in absolute terms and as a percentage of the
Company's net revenues. (All figures in thousands except as otherwise noted).

<Table>
<Caption>
                                                                   THREE MONTHS ENDED
                                                          ------------------------------------
                                                              JULY 1,             JULY 2,
                                                                2001                2000
                                                          ----------------    ----------------
                                                                             
Net revenues............................................  $89,901    100.0%   $76,773    100.0%
Cost of revenues........................................   34,311     38.2     26,588     34.6
                                                          -------    -----    -------    -----
  Gross profit..........................................   55,590     61.8     50,185     65.4
                                                          -------    -----    -------    -----
Operating expenses:
  Engineering and development...........................   17,397     19.4     12,557     16.3
  Selling and marketing.................................   10,157     11.3      8,346     10.9
  General and administrative............................    4,432      4.9      3,433      4.5
                                                          -------    -----    -------    -----
          Total operating expenses......................   31,986     35.6     24,336     31.7
                                                          -------    -----    -------    -----
       Operating income.................................  $23,604     26.2%   $25,849     33.7%
                                                          =======    =====    =======    =====
</Table>

  Net Revenues

     Our net revenues are derived primarily from the sale of SCSI and Fibre
Channel-based products. We also license certain designs and receive royalty
revenues and non-recurring engineering fees. Net revenues in the three months
ended July 1, 2001 increased $13.1 million or 17.1% from the three months ended
July 2, 2000, to $89.9 million. The increase was the result of a $16.2 million
increase in sales of Fibre Channel products, offset by a $0.3 million decrease
in sales of SCSI products and a $2.8 million decrease in IDE-based royalties.
The decrease in IDE-based royalties was due to a customer's wind-down of certain
program designs which in turn, reduced royalties earned.

     Export revenues in the three months ended July 1, 2001 increased $5.7
million or 14.0% from the three months ended July 2, 2000, to approximately
$46.4 million, primarily due to increased sales to customers in the UK and
Singapore and, to a lesser extent, other European countries. As a percentage of
net revenues, export revenues accounted for 51.6% in the three months ended July
1, 2001, which was down from 52.6% in the three months ended July 2, 2000 due to
increased sales to U.S. based customers. Export revenues are denominated in U.S.
dollars.

                                        6
   9

     A small number of customers account for a substantial portion of our net
revenues, and we expect that a limited number of customers will continue to
represent a substantial portion of our net revenues in the foreseeable future.
We believe that our major customers continually evaluate whether or not to
purchase products from alternate or additional sources. Additionally, our
customers' economic and market conditions frequently change. Accordingly, there
can also be no assurance that a major customer will not reduce, delay or
eliminate its purchases from us. Any such reduction, delay or loss of purchases
could have a material adverse effect on our business, financial condition and
results of operations.

  Gross Profit

     Cost of revenues consist primarily of raw materials (including wafers and
completed chips from third-party manufacturers), assembly and test labor,
overhead and warranty costs. The gross profit percentage for the three months
ended July 1, 2001 was 61.8%, a decrease from 65.4% in the three months ended
July 2, 2000. The decrease in gross profit percentage was due to a reduction in
IDE-based royalties combined with an increase in costs associated with new SCSI
products, and increased revenues with lower margin switch products.

     Our ability to maintain our current gross profit percentage can be
significantly affected by factors such as supply costs and, in particular, the
cost of silicon wafers, the worldwide semiconductor foundry capacity, the mix of
products shipped, competitive price pressures, the timeliness of volume
shipments of new products, the level of royalties received and our ability to
achieve manufacturing cost reductions. We anticipate it will be increasingly
more difficult to maintain or reduce manufacturing costs. Also, royalty revenues
may be irregular or unpredictable. As a result of these and other factors, we do
not anticipate the gross profit percentage to remain constant or increase at a
rate consistent with historic trends, and, it may decline in future quarters, as
reflected in this quarter's decline.

  Operating Expenses

     Engineering and Development. Engineering and development expenses consist
primarily of salaries and other personnel-related expenses, development-related
material, occupancy costs and computer support. We believe continued investments
in engineering and development activities are critical to achieving our
strategic objectives. We expect the dollar amount of engineering and development
expenses will continue to increase in fiscal 2002.

     During the three months ended July 1, 2001, engineering and development
expenses increased $4.8 million to $17.4 million from $12.6 million in the three
months ended July 2, 2000. The increase in spending was largely due to increased
levels of spending for Fibre Channel and SCSI design, as well as enclosure
management product design. As a percentage of net revenues, engineering and
development expenses increased to 19.4% in the three months ended July 1, 2001
from 16.3% the similar prior year period. The increase as a percentage of net
revenues was due in part to certain stock compensation programs adopted in
connection with the Little Mountain Group, Inc. acquisition. Additionally, the
increase as a percentage of net revenues was due to increases in engineering and
development headcount.

     Selling and Marketing. Selling and marketing expenses consist primarily of
sales and marketing salaries, sales commissions and related expenses,
promotional activities and travel for sales and marketing personnel. We believe
continued investments of these types of expenses are critical to the success of
our strategy of expanding relationships with our customers. As a result, we
expect sales and marketing expenditures will increase in the future.

     During the three months ended July 1, 2001, selling and marketing expenses
increased $1.8 million to $10.2 million from $8.4 million in the three months
ended July 2, 2000. The increase in spending was largely due to increased staff
in sales and marketing to manage new programs. As a percentage of net revenues,
sales and marketing expenses increased to 11.3% in the three months ended July
1, 2001 from 10.9% in the similar prior year period. The increase was due to a
greater level of planned new program introductions.

                                        7
   10

     General and Administrative. General and administrative expenses consist
primarily of salaries and related expenses for executive, finance, accounting,
human resources and information technology personnel. Non-personnel related
expenses consist of recruiting fees, professional services and corporate
expenses. We expect general and administrative expenses to increase in absolute
dollars as we add personnel and incur additional costs relating to the growth of
the business.

     During the three months ended July 1, 2001, general and administrative
expenses increased $1.0 million to $4.4 million from $3.4 million in the three
months ended July 2, 2000. The increase in spending was primarily due to the
growth in administrative personnel and professional services. As a percentage of
net revenues, general and administrative expenses increased to 4.9% in the three
months ended July 1, 2001 from 4.5% in the similar prior year period. The
increase as a percentage of net revenues was due to increased amortization of
intangible assets relating to the Company's prior acquisitions.

  Non-Operating Income

     Interest and other income, net of interest expense, was $5.1 million for
the three months ended July 1, 2001 and $3.8 million for the three months ended
July 2, 2000. The increase was largely due to increases in interest income
related to increases in cash equivalents and investment balances.

  Income Tax Provision

     The Company's effective tax rates approximated 33% and 34% for the three
months ended July 1, 2001, and July 2, 2000, respectively. The decrease in tax
rate was due to the favorable resolution of tax audits for prior fiscal years.

  New Accounting Standards

     In June 1998, the Financial Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standards No. ("SFAS") 133, "Accounting for
Derivative Instruments and Hedging Activities". SFAS 133 establishes accounting
and reporting standards for derivative instruments, hedging activities, and
exposure definition. In June 2000, the FASB issued SFAS 138 "Accounting for
Certain Derivative Instruments and Certain Hedging Activities, an amendment of
FASB Statement No. 133 ("SFAS 138"). We adopted the provisions of SFAS 133 and
SFAS 138 during the quarter ended July 1, 2001, and did not have a material
impact on our financial position or overall trends in results of operations.

     Effective July 1, 2001, we adopted SFAS 141 "Business Combinations". SFAS
141 addresses financial accounting and reporting for business combinations and
requires that all business combinations initiated after June 30, 2001 be
accounted for by a single method -- the purchase method. The adoption of SFAS
141 did not have a material impact on the Company's financial position or
results of operations.

     SFAS 142 "Goodwill and Other Intangible Assets" requires that goodwill and
intangible assets that have indefinite useful lives not to be amortized but
rather be tested at least annually for impairment. We are required to adopt SFAS
142 on January 1, 2002. However, goodwill and intangible assets acquired after
June 30, 2001 are subject to the amortization provisions of SFAS 142. We
estimate that the adoption of SFAS 142 will decrease amortization expense in
2002 by approximately $0.6 million (net of income taxes of $0.2 million).

  Liquidity and Capital Resources

     Our combined balances of cash and cash equivalents and short-term
investments have increased to $379.7 million at July 1, 2001 and were $355.5
million at April 1, 2001. The increase was primarily attributable to positive
cash flow from operations during the three months ended July 1, 2001.

     Our primary source of liquidity is derived from working capital and a $5.0
million unsecured line of credit with Silicon Valley Bank. Working capital
increased $23.2 million to $465.9 million at July 1, 2001. The increase in
working capital in the quarter ended July 1, 2001 was largely attributable to
cash flow from operations. The $5.0 million line of credit facility with Silicon
Valley Bank allows us to borrow at the bank's

                                        8
   11

prime rate. The credit facility expires on July 5, 2002, and, although there can
be no assurance, we currently expect to renew this line of credit. There were no
borrowings under this credit facility as of July 1, 2001.

     Our cash flow provided by operations was $28.3 million in the three months
ended July 1, 2001, and $31.8 million in the three months ended July 2, 2000.
The reduction in cash provided by operations was primarily due to reductions in
accounts payable, accrued compensation and income taxes payable and partially
offset by increases in accounts receivable.

     Our cash flow used in investing activities was $45.6 million in the three
months ended July 1, 2001 compared to $38.3 million in the three months ended
July 2, 2000. The increase in cash used in investing activities for the three
months ended July 1, 2001 was primarily due to increases in purchases of
short-term investments, net of maturing investments. Additionally, we made a $3
million strategic investment in a privately-held Infiniband development company.
Capital expenditures were $2.7 million in the three months ended July 1, 2001
and $5.9 million in the three months ended July 2, 2000. The decrease was due to
an unusually high level of building improvement expenditures relating to the
corporate facility relocation in the three months ended July 2, 2000.

     Our cash flow provided by financing activities was $1.9 million in the
three months ended July 1, 2001 compared to $2.2 million in the three months
ended July 2, 2000. The decrease in cash provided by financing activities in the
three months ended July 1, 2001 was primarily due to decreases in proceeds from
issuance of stock under employee stock plans due to lower average stock prices.

     We believe that existing cash and cash equivalent balances, short term
investments, facilities and equipment leases, and cash flows from operating
activities will provide us with sufficient funds to finance our operations for
at least the next 12 months.

                     FACTORS THAT MAY AFFECT FUTURE RESULTS

     Except for the historical information contained herein, the information in
this report constitutes forward-looking statements. When used in this report the
words "shall," "should," "forecast," "all of," "projected," "believes,"
"anticipates" "expects," and similar expressions are intended to identify
forward-looking statements. In addition, we may from time to time make oral
forward-looking statements. We wish to caution readers that a number of
important factors could cause actual results to differ materially from those in
the forward-looking statements. Factors that could cause or contribute to such
differences include those discussed below, as well as those discussed above in
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" or elsewhere in this report.

OUR STOCK PRICE MAY BE VOLATILE WHICH COULD AFFECT THE VALUE OF YOUR INVESTMENT.

     The market price of our common stock has fluctuated substantially, and
there can be no assurance that such volatility will not continue. From January
1, 2001 through July 1, 2001, the market price has ranged from a low of $17.81
per share to a high of $99.13 per share. Several factors could impact our stock
price including, but not limited to:

     - announcements concerning QLogic, our competitors or customers;

     - quarterly fluctuations in our operating results;

     - introduction of new products or changes in product pricing policies by us
       or our competitors;

     - conditions in the semiconductor industry;

     - changes in earnings estimates by industry analysts; and

     - market conditions for high technology equities in general.

     In addition, stock markets have experienced extreme price and volume
volatility in recent years and stock prices of technology companies have been
especially volatile. This volatility has had a substantial effect on the market
prices of securities of many smaller public companies for reasons frequently
unrelated to the operating

                                        9
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performance of the specific companies. These broad market fluctuations could
adversely affect the market price of our common stock.

OUR OPERATING RESULTS FLUCTUATE SIGNIFICANTLY, WHICH COULD CAUSE OUR STOCK PRICE
TO DECLINE IF OUR RESULTS FAIL TO MEET INVESTORS' AND ANALYSTS' EXPECTATIONS.

     We have experienced, and expect to continue to experience, fluctuations in
sales and operating results from quarter to quarter. As a result, we believe
that period-to-period comparisons of our operating results are not necessarily
meaningful, and that such comparisons cannot be relied upon as indicators of
future performance. In addition, there can be no assurance that we will maintain
our current profitability in the future. A significant portion of our net
revenues in each fiscal quarter result from orders booked in that quarter.
Orders placed by major customers are typically based on their forecasted sales
and inventory levels for our products. Fluctuations in our quarterly operating
results may be the result of:

     - changes in purchasing patterns by one or more of our major customers,
       order changes or rescheduling;

     - gain or loss of significant customers;

     - customer policies pertaining to desired inventory levels of our products;

     - negotiations of rebates and extended payment terms;

     - changes in our ability to anticipate in advance the mix of customer
       orders;

     - level of inventory our customers require us to maintain in our field
       warehouses;

     - the time, availability and sale of new products;

     - changes in the mix of products having differing gross margins;

     - variations in manufacturing capacities, efficiencies and costs;

     - the availability and cost of components, including silicon wafers;

     - warranty expenses;

     - variations in product development and other operating expenses;

     - revenue adjustments related to product returns;

     - adoption of new accounting pronouncements and/or changes in our policies;
       or

     - general economic and other conditions effecting the timing of customer
       orders and capital spending.

     Our quarterly results of operations are also influenced by competitive
factors, including the pricing and availability of our products and our
competitors' products. Although we do not maintain our own wafer manufacturing
facility, large portions of our expenses are fixed and difficult to reduce in a
short period of time. If net revenues do not meet our expectations, our fixed
expenses would magnify the effect on net income of such shortfall in net
revenues. Furthermore, announcements regarding new products and technologies
could cause our customers to defer or cancel purchases of our products. Order
deferrals by our customers, delays in our introduction of new products, and
longer than anticipated design-in cycles for our products have in the past
adversely effected our quarterly results of operations. Due to these factors, as
well as other unanticipated factors, it is likely that in some future quarter or
quarters our operating results will be below the expectations of public market
analysts or investors, and as a result, the price of our common stock could
significantly decrease.

OUR BUSINESS IS DEPENDENT ON THE STORAGE AREA NETWORK MARKET THAT IS NEW AND
UNPREDICTABLE, AND IF THIS MARKET DOES NOT DEVELOP AND EXPAND AS WE ANTICIPATE,
OUR BUSINESS WILL SUFFER.

     Fibre Channel-based storage area networks, or SANs, were first deployed in
1997. As a result, the market for SANs and related storage router products has
only recently begun to develop and is rapidly evolving. Because this market is
new, it is difficult to predict its potential size or future growth rate. A
significant

                                        10
   13

number of our products are used exclusively in SANs and, therefore, our business
is dependent on the SAN market. Accordingly, the widespread adoption of SANs for
use in organizations' computing systems is critical to our future success. Most
of the organizations that potentially may purchase our products from our
customers have invested substantial resources in their existing computing and
data storage systems and, as a result, may be reluctant or slow to adopt a new
approach like SANs. SANs are often implemented in connection with the deployment
of new storage systems and servers. Therefore, our future success is also
substantially dependent on the market for new storage systems and servers.
Furthermore, the ability of the different components used in a SAN to function
effectively, or interoperate, with each other when placed in a computing system
has not yet been achieved on a widespread basis. Until greater interoperability
is achieved, customers may be reluctant to deploy SANs. Our success in
generating revenue in the emerging SAN market will depend on, among other
things, our ability to:

     - educate potential OEM customers, distributors, resellers, system
       integrators, storage service providers and end-user organizations about
       the benefits of SANs;

     - maintain and enhance our relationships with OEM customers, distributors,
       resellers, system integrators, and storage system providers;

     - predict and base our products on standards which ultimately become
       industry standards; and

     - achieve interoperability between our products and other SAN components
       from diverse vendors.

OUR FINANCIAL CONDITION WILL BE MATERIALLY HARMED IF WE DO NOT MAINTAIN AND GAIN
MARKET OR INDUSTRY ACCEPTANCE OF OUR PRODUCTS.

     The markets in which we compete involve rapidly changing technology,
evolving industry standards and continuing improvements in products and
services. Our future success depends, in part, on our ability to:

     - enhance our current products and to develop and introduce in a timely
       manner new products that keep pace with technological developments and
       industry standards;

     - compete effectively on the basis of price and performance; and

     - adequately address original equipment manufacturer customer and end-user
       customer requirements and achieve market acceptance.

     We believe that to remain competitive in the future we will need to
continue to develop new products, which will require a significant investment in
new product development. A significant portion of our revenues is generated from
Fibre Channel technology. We, and some of our competitors, are developing
alternative technologies that may compete with the market acceptance of our
Fibre Channel products, such as iSCSI and Infiniband. If alternative standards
are adopted by the industry, we may not be able to develop products for new
standards in a timely manner. Further, even if alternative technologies do
augment Fibre Channel revenues, our products may not be fully developed in time
to be accepted by our customers. Even if our new products are developed on time,
we may not be able to manufacture them at competitive prices in sufficient
volumes.

WE DEPEND ON A LIMITED NUMBER OF CUSTOMERS AND ANY DECREASE IN REVENUE FROM ANY
ONE OF OUR CUSTOMERS COULD CAUSE OUR STOCK PRICE TO DECLINE.

     A small number of customers account for a substantial portion of our net
revenues, and we expect that a limited number of customers will continue to
represent a substantial portion of our net revenues in the foreseeable future.
The loss of any of our major customers would have a material adverse effect on
our business, financial condition and results of operations. Some of these
customers are based in the Pacific Rim, which is subject to economic and
political uncertainties. In addition, a majority of our customers order products
through written purchase orders as opposed to long-term supply contracts and,
therefore, such customers are generally not obligated to purchase products from
us for any extended period. Major customers also have significant leverage over
us and may attempt to change the terms, including pricing, which could
materially adversely effect our business, financial condition and results of
operations. This risk is increased due

                                        11
   14

to the potential for some of these customers to merge with or acquire another of
our customers. As our original equipment manufacturer customers are pressured to
reduce prices as a result of competitive factors, we may be required to
contractually commit to price reductions for our products before we know how, or
if, cost reductions can be obtained. If we are unable to achieve such cost
reductions, our gross margins could decline and such decline could have a
material adverse effect on our business, financial condition and results of
operations.

COMPETITION WITHIN OUR PRODUCT MARKETS IS INTENSE AND INCLUDES NUMEROUS
ESTABLISHED COMPETITORS.

     The markets for our products are highly competitive and are characterized
by short product life cycles, price erosion, rapidly changing technology,
frequent product performance improvements and evolving industry standards. We
currently compete primarily with Adaptec Inc. and LSI Logic Corporation in the
SCSI sector of the I/O market. In the Fibre Channel host bus adapter sector of
the I/O market, we compete primarily with Agilent Technologies, LSI Logic
Corporation, Emulex Corporation, JNI Corporation and Adaptec Inc. In the switch
products sector, we compete with Brocade Communications and several smaller
companies. In the enclosure management sector, we compete primarily with Vitesse
Semiconductor Corporation. We may compete with some of our larger disk drive and
computer systems customers, some of which have the capability to develop I/O
controller integrated circuits for use in their own products. At least one large
original equipment manufacturer customer in the past has decided to vertically
integrate and has therefore stopped purchasing from us.

     We will need to continue to develop products appropriate to our markets to
remain competitive as our competitors continue to introduce products with
improved performance characteristics. While we continue to devote significant
resources to research and development, these efforts may not be successful, or
may not be developed and introduced in a timely manner. Further, several of our
competitors have greater resources devoted to securing semiconductor foundry
capacity because of long-term agreements regarding supply flow, equity or
financing agreements or direct ownership of a foundry. In addition, while
relatively few competitors offer a full range of storage area networking
products, additional domestic and foreign manufacturers may increase their
presence in these markets. We may not be able to compete successfully against
these or other competitors. If we are unable to design, develop and introduce
competitive new products on a timely basis, our future operating results will be
materially and adversely affected.

OUR DISTRIBUTORS MAY NOT ADEQUATELY DISTRIBUTE OUR PRODUCTS WHICH COULD
NEGATIVELY AFFECT OUR OPERATIONS.

     Our distributors generally offer a diverse array of products from several
different manufacturers and suppliers. Accordingly, we are at risk that these
distributors may give higher priority to selling products from other suppliers,
thus reducing their efforts to sell our products. A reduction in sales efforts
by our current distributors could materially adversely impact our business or
operating results. Our distributors may on occasion build inventories in
anticipation of substantial growth in sales, and if such growth does not occur
as rapidly as we anticipate, distributors may decrease the amount of product
ordered from us in subsequent quarters. In addition, if we decrease our
distributor-incentive programs, our distributors may temporarily decrease the
amounts of product purchased from us. This could result in a change of business
habits, and distributors may decide to decrease the amount of product held and
reduce their inventory levels. In addition, we may from time to time take
actions to reduce levels of our products at distributors.

WE DEPEND ON OUR RELATIONSHIPS WITH WAFER SUPPLIERS AND OTHER SUBCONTRACTORS AND
A LOSS OF THESE RELATIONSHIPS MAY LEAD TO UNPREDICTABLE CONSEQUENCES WHICH MAY
HARM OUR RESULTS OF OPERATIONS IF ALTERNATIVE SUPPLY SOURCES ARE NOT AVAILABLE.

     We currently rely on several independent foundries to manufacture our
semiconductor products either in finished form or wafer form. Generally, we
conduct business with some of our foundries through written purchase orders as
opposed to long-term supply contracts. Therefore, these foundries are generally
not obligated to supply products to us for any specific period, in any specific
quantity or at any specified price. If a foundry terminates its relationship
with us or if our supply from a foundry is otherwise interrupted, we may not

                                        12
   15

have a sufficient amount of time to replace the supply of products manufactured
by that foundry. As a result, we may not be able to meet customer demands, which
could harm our business.

     Historically, there have been periods when there has been a worldwide
shortage of advanced process technology foundry capacity. The manufacture of
semiconductor devices is subject to a wide variety of factors, including the
availability of raw materials, the level of contaminants in the manufacturing
environment, impurities in the materials used, and the performance of personnel
and equipment. We are continuously evaluating potential new sources of supply.
However, the qualification process and the production ramp-up for additional
foundries have in the past taken, and could in the future take, longer than
anticipated. New supply sources may not be able or willing to satisfy our wafer
requirements on a timely basis or at acceptable quality or unit prices.

     We use multiple sources of supply for some of our products, which may
require customers to perform separate product qualifications. We have not
developed alternate sources of supply for all of our products and our newly
introduced products are typically produced initially by a single foundry until
alternate sources can be qualified. In particular, our integrated single chip
Fibre Channel controller is manufactured by LSI Logic and integrates LSI Logic's
transceiver technology. In the event that LSI Logic is unable or unwilling to
satisfy our requirements for this technology, our marketing efforts related to
Fibre Channel products would be delayed and, as such, our results of operations
could be materially and adversely affected. The requirement that a customer
perform separate product qualifications, or a customer's inability to obtain a
sufficient supply of products from us, may cause that customer to satisfy its
product requirements from our competitors. Constraints or delays in the supply
of our products, due to capacity constraints, unexpected disruptions at our
foundries or with our subcontractors, delays in obtaining additional production
at the existing foundries or in obtaining production from new foundries,
shortages of raw materials or other reasons, could result in the loss of
customers.

OUR PRODUCTS ARE COMPLEX AND MAY CONTAIN UNDETECTED SOFTWARE OR HARDWARE ERRORS
THAT COULD LEAD TO AN INCREASE IN OUR COSTS, REDUCE OUR NET REVENUES OR DAMAGE
OUR REPUTATION.

     Products as complex as ours frequently contain undetected software or
hardware errors when first introduced or as newer versions are released. We have
from time to time found errors in existing, new or enhanced products. The
occurrence of hardware or software errors could adversely affect sales of our
products, cause us to incur significant warranty and repair costs, divert the
attention of our engineering personnel from our product development efforts and
cause significant customer relations problems.

BECAUSE WE DEPEND ON FOREIGN CUSTOMERS AND SUPPLIERS, WE ARE SUBJECT TO
INTERNATIONAL ECONOMIC, REGULATORY AND POLITICAL RISKS THAT COULD HARM OUR
FINANCIAL CONDITION.

     We expect that export revenues will continue to account for a significant
percentage of our net revenues for the foreseeable future. As a result, we are
subject to several risks, which include:

     - a greater difficulty of administering our business globally;

     - compliance with multiple and potentially conflicting regulatory
       requirements, such as export requirements, tariffs and other barriers;

     - differences in intellectual property protections;

     - difficulties in staffing and managing foreign operations;

     - potentially longer accounts receivable cycles;

     - currency fluctuations;

     - export control restrictions;

     - overlapping or differing tax structures;

     - political and economic instability; and

     - general trade restrictions.

                                        13
   16

     A significant number of our customers and suppliers are located in Japan.
Historically, the Asian markets have suffered from economic uncertainty. This
uncertainty has taken place especially in countries that have had a collapse in
both their currency and stock markets. These economic pressures have reduced
liquidity in the banking systems of the affected countries and, when coupled
with spare industrial production capacity, could lead to widespread financial
difficulty among the companies in this region. Our export sales are invoiced in
U.S. dollars and, accordingly, if the relative value of the U.S. dollar in
comparison to the currency of our foreign customers should increase, the
resulting effective price increase of our products to such foreign customers
could result in decreased sales. There can be no assurance that any of the
foregoing factors will not have a material adverse effect on our business,
financial condition and results of operations.

WE MAY NEED TO ENGAGE IN FINANCIALLY RISKY TRANSACTIONS TO GUARANTEE WE HAVE
PRODUCTION CAPACITY WHICH MAY REQUIRE US TO SEEK ADDITIONAL FINANCING AND RESULT
IN DILUTION TO OUR STOCKHOLDERS.

     The semiconductor industry has, in the past, experienced shortages of
available foundry capacity. Accordingly, in order to secure an adequate supply
of wafers, we may consider various possible supply agreements. Those types of
agreements include the use of "take or pay" contracts, making equity investments
in, or advances to, wafer manufacturing companies in exchange for guaranteed
production capacity, or the formation of joint ventures to own and operate or
construct foundries or to develop certain products. Any of these arrangements
would involve financial risk to us and could require us to commit a substantial
amount of our funds or provide technology licenses in return for guaranteed
production capacity. The need to commit our own funds may require us to seek
additional equity or debt financing. The sale or issuance of additional equity
or convertible debt securities could result in dilution to our stockholders.
This kind of additional financing, if necessary, may not be available on terms
acceptable to us.

WE ANTICIPATE ENGAGING IN MERGERS, ACQUISITIONS AND STRATEGIC INVESTMENTS,
HOWEVER, THESE ACTIVITIES MAY ADVERSELY AFFECT OUR RESULTS OF OPERATIONS AND
STOCK PRICE IF THEY DO NOT COMPLEMENT OUR BUSINESS.

     We anticipate that our future growth may depend in part on our ability to
identify and acquire complementary businesses, technologies or product lines
that are compatible with ours. Mergers and acquisitions involve numerous risks,
including:

     - uncertainties in identifying and pursuing target companies;

     - difficulties in the assimilation of the operations, technologies and
       products of the acquired companies;

     - the diversion of management's attention from other business concerns;

     - risks associated with entering markets or conducting operations with
       which we have no or limited direct prior experience;

     - the potential loss of current customers and/or retention of the acquired
       company's customers; and

     - the potential loss of key employees of the acquired company.

     Further, we may never realize the perceived benefits of a business
combination. Future acquisitions by us could dilute stockholders' investment,
and cause us to incur debt, contingent liabilities and amortization/impairment
expense related to goodwill and other intangible assets, all of which could
materially adversely affect our results of operations. Effective July 1, 2001,
the Financial Accounting Standards Board, or FASB, has issued, and we have
adopted, SFAS 141 "Business Combinations". SFAS 141 addresses financial
accounting and reporting for business combinations and requires that all
business combinations implemented after June 30, 2001 be accounted for using the
purchase method of accounting. As a result, we may not be able to complete a
business combination without incurring goodwill or other intangible assets.
While the new proposal would eliminate the quarterly and yearly recurring
charges for the amortization of goodwill, a significant charge to earnings may
be recorded if it can be determined that the goodwill is impaired. This
potential charge could have a material impact on our results of operations.

     We have made, and plan to continue to make, investments in technology
companies including privately held companies in a development stage. Many of
these private equity investments are inherently risky because

                                        14
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the companies' businesses may never develop, and we may incur losses related to
these investments. We may be required to reduce the value of those investments
as reflected on our balance sheet, which also may affect our results of
operations. In addition if we incur a charge to reflect other than temporary
declines in the value of our private equity investments below our recorded
value, our balance sheet and results of operations will be reduced.

OUR BUSINESS COULD BE MATERIALLY ADVERSELY AFFECTED AS A RESULT OF THE RISKS
ASSOCIATED WITH STRATEGIC ALLIANCES.

     We have alliances with leading information technology companies and we plan
to continue our strategy of developing key alliances in order to expand our
reach into emerging markets. There can be no assurance that we will be
successful in our ongoing strategic alliances or that we will be able to find
further suitable business relationships as we develop new products and
strategies. Any failure to continue or expand such relationships could have a
material adverse effect on our business, results of operations or financial
conditions.

     There can be no assurance that companies with which we have strategic
alliances, certain of which have substantially greater financial, marketing and
technological resources than us, will not develop or market products in
competition with us in the future, discontinue their alliances with us or form
alliances with our competitors.

CONTINUED RAPID GROWTH WILL STRAIN OUR OPERATIONS AND REQUIRE THAT WE INCUR
COSTS TO UPGRADE OUR INFRASTRUCTURE.

     We have recently experienced a period of rapid growth and expansion that
has placed, and continues to place, a significant strain on our resources.
Unless we manage this growth effectively, we may make mistakes in executing our
business such as inaccurate sales forecasting, material planning, inventory
management or financial reporting, which may result in unanticipated
fluctuations in our operating results. We may not be able to install adequate
control systems in an efficient and timely manner, and our current or planned
personnel, systems, procedures and controls may not be adequate to support our
future operations. In addition, we test substantially all of our products prior
to shipment. If our capacity to conduct this testing does not expand
concurrently with the anticipated growth of our business, product shipments
could be delayed, which could result in delayed or lost revenues and customer
dissatisfaction.

IF WE ARE UNABLE TO ATTRACT AND RETAIN KEY PERSONNEL, WE MAY NOT BE ABLE TO
SUSTAIN OR GROW OUR BUSINESS.

     Our future success largely depends on our key engineering, sales, marketing
and executive personnel, including highly skilled semiconductor design personnel
and software developers. We also must identify and hire additional personnel. If
we lose the services of key personnel, our business would be adversely affected.
We believe that the market for key personnel in the industries in which we
compete is highly competitive. In particular, periodically we have experienced
difficulty in attracting and retaining qualified engineers and other technical
personnel and anticipate that competition for such personnel will increase in
the future. We may not be able to attract and retain key personnel with the
skills and expertise necessary to develop new products in the future, or to
manage our business, both in the United States and abroad.

OUR PROPRIETARY RIGHTS MAY BE INADEQUATELY PROTECTED AND INFRINGEMENT CLAIMS OR
ADVERSE JUDGMENTS COULD HARM OUR COMPETITIVE POSITION.

     Although we have patent protection on some aspects of our technology in
some jurisdictions, we rely primarily on trade secrets, copyrights and
contractual provisions to protect our proprietary rights. There can be no
assurance that these protections will be adequate to protect our proprietary
rights, that others will not independently develop or otherwise acquire
equivalent or superior technology or that we can maintain such technology as
trade secrets. There also can be no assurance that any patents we possess will
not be invalidated, circumvented or challenged. In addition, the laws of certain
countries in which our products are or may be developed, manufactured or sold,
including various countries in Asia, may not protect our products and
intellectual property rights to the same extent as the laws of the United States
or at all. If we fail to protect our intellectual property rights, our business
would be negatively impacted.

                                        15
   18

     Intellectual property claims have been made against us in the past, and
patent or other intellectual property infringement claims could be made against
us in the future. Although patent and intellectual property disputes may be
settled through licensing or similar arrangements, costs associated with these
arrangements may be substantial and the necessary licenses or similar
arrangements may not be available to us on satisfactory terms or at all. As a
result, we could be prevented from manufacturing and selling some of our
products. In addition, if we litigate these kinds of claims, the litigation
could be expensive and time consuming and could divert management's attention
from other matters. Our business could suffer regardless of the outcome of the
litigation. Our supply of wafers and other components can also be interrupted by
intellectual property infringement claims against our suppliers.

OUR CHARTER DOCUMENT AND SHAREHOLDER RIGHTS PLAN MAY DISCOURAGE COMPANIES FROM
ACQUIRING US AND OFFERING OUR STOCKHOLDERS A PREMIUM FOR THEIR STOCK.

     Pursuant to our certificate of incorporation, our board of directors is
authorized to approve the issuance of shares of currently undesignated preferred
stock without any vote or future action by the stockholders. Pursuant to this
authority, in June 1996 our board of directors adopted a shareholder rights plan
and declared a dividend of a right to purchase one one-hundredths of a share of
preferred stock for each outstanding share of our common stock. After adjustment
for each of the three two-for-one stock splits effected by us to date, our
common stock now carries one-eighth of the preferred stock purchase right per
share. The shareholder rights plan may have the effect of delaying, deferring or
preventing a change in control of our stock. This may discourage bids for our
common stock at a premium over the market price of the common stock and may
adversely affect the market price of the common stock.

OUR CORPORATE HEADQUARTERS AND PRINCIPAL DESIGN FACILITIES ARE LOCATED IN A
REGION THAT IS SUBJECT TO EARTHQUAKES AND OTHER NATURAL DISASTERS, AS WELL AS
ELECTRICITY SHORTAGES.

     Our California facilities, including our principal executive offices, our
principal design facilities, and our critical business operations are located
near major earthquake faults. We are not specifically insured for earthquakes,
or other such natural disasters. Any personal injury or damage to the facilities
as a result of such occurrences could have a material adverse effect on our
business, results of operations and financial condition. Additionally, our
operations depend upon a continuing adequate supply of electricity, natural gas
and water. These energy sources have historically been available on a continuous
basis and in adequate quantities for our needs. An interruption in the supply of
raw materials or energy inputs for any reason would have an adverse effect on
our manufacturing operations. Recently, California has had power shortages
resulting in rolling blackouts, or the temporary and generally unannounced loss
of electrical power. These shortages could affect our ability to supply products
to our customers on a timely basis.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

  Interest Rate Sensitivity

     At July 1, 2001, our investment portfolio consisted of fixed income
securities, excluding those classified as cash equivalents, with a fair value of
$266.9 million. The carrying amount of these securities approximates fair market
value. These securities are subject to interest rate risk and will decline in
value if market interest rates increase. If market interest rates were to
increase immediately and uniformly by 10% from levels as of July 1, 2001, the
decline in the fair value of the portfolio would not be material to our
financial position, results of operations and cash flows.

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                           PART II. OTHER INFORMATION

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

     (a) Exhibits

<Table>
<Caption>
EXHIBIT
NUMBER                             ITEM CAPTION
- -------                            ------------
        
 2.1       Distribution Agreement dated as of January 24, 1994 among
           Emulex Corporation, a Delaware corporation, Emulex
           Corporation, a California Corporation and QLogic
           Corporation.(2)
 2.2       Agreement and Plan of Merger dated as of May 8, 2000 by and
           among QLogic Corporation, Amino Acquisition Corp. and Ancor
           Communications, Incorporated.(11)
 3.1       Certificate of Incorporation of Emulex Micro Devices
           Corporation, dated November 13, 1992.(2)
 3.2       EMD Incorporation Agreement, dated as of January 1, 1993.(2)
 3.3       Certificate of Amendment of Certificate of Incorporation,
           dated May 26, 1993.(2)
 3.4       By-Laws of QLogic Corporation.(2)
 3.5       Amendments to By-Laws of QLogic Corporation.(3)
 3.6       Certificate of Amendment of Certificate of Incorporation,
           dated May 26, 1993.(2)
 3.7       Certificate of Amendment of Certificate of Incorporation,
           dated February 15, 1999.(8)
 3.8       Certificate of Amendment of Certificate of Incorporation,
           dated January 5, 2000.(9)
 4.1       Rights Agreement, dated as of June 4, 1996 between QLogic
           Corporation and Harris Trust Company of California, which
           includes as Exhibit B thereto the form of Rights
           Certificate.(4)
 4.2       Amendment to Rights Agreement, dated as of November 19, 1997
           between QLogic Corporation and Harris Trust Company of
           California.(5)
 4.3       Amendment to Rights Agreement, dated as of January 24, 2000
           between QLogic Corporation and Harris Trust Company of
           California.(10)
10.1.2     Form of QLogic Corporation Non-Employee Director Stock
           Option Plan, as amended.(13)
10.2.2     QLogic Corporation Stock Awards Plan, as amended.(13)
10.3       Form of Tax Sharing Agreement among Emulex Corporation, a
           Delaware corporation, Emulex Corporation, a California
           corporation, and QLogic Corporation.(2)
10.4       Administrative Services Agreement, dated as of February 21,
           1993, among Emulex Corporation, a California corporation,
           Emulex Corporation, a Delaware corporation and QLogic
           Corporation.(2)
10.5       Employee Benefits Allocation Agreement, dated as of January
           24, 1994, among Emulex Corporation, a Delaware corporation,
           Emulex Corporation, a California corporation, and QLogic
           Corporation.(2)
10.6       Form of Assignment, Assumption and Consent Re: Lease among
           Emulex Corporation, a California corporation, QLogic
           Corporation and C.J. Segerstrom & Sons, a general
           partnership.(2)
10.7       Intellectual Property Assignment and Licensing Agreement,
           dated as of January 24, 1994, between Emulex Corporation, a
           California Corporation, and QLogic Corporation.(2)
10.8       Form of QLogic Corporation Savings Plan.*(2)
10.9       Form of QLogic Corporation Savings Plan Trust.*(2)
10.11      Form of Indemnification Agreement between QLogic Corporation
           and Directors.(3)
10.13      Industrial Lease Agreement between the Registrant, as
           lessee, and AEW/Parker South, LLC, as lessor.(7)
</Table>

                                        17
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<Table>
<Caption>
EXHIBIT
NUMBER                             ITEM CAPTION
- -------                            ------------
        
10.15      Form QLogic Corporation 1998 Employee Stock Purchase
           Plan.(8)
10.16      Loan and Security Agreement with Silicon Valley Bank dated
           March 31, 1994.(1)
10.16.1    Amendment to Loan and Security Agreement with Silicon Valley
           Bank dated July 6, 1998.(6)
10.16.2    Amendment to Loan and Security Agreement with Silicon Valley
           Bank dated July 5, 2001.
21.2       Subsidiaries of the Registrant.(13)
</Table>

- ---------------
 (1) Previously filed as Exhibit 10.10 to Registrant's Annual Report on Form
     10-K for the year ended April 3, 1994 and incorporated herein by reference.

 (2) Previously filed as an exhibit to Registrant's Registration Statement on
     Form 10 on January 28, 1994, and incorporated herein by reference.

 (3) Previously filed as an exhibit to Registrant's Annual Report on Form 10-K
     for the year ended April 2, 1995, and incorporated herein by reference.

 (4) Previously filed as an exhibit to Registrant's Registration Statement on
     Form 8-A on June 19, 1996, and incorporated herein by reference.

 (5) Previously filed as an exhibit to Registrant's Registration Statement on
     Form 8-A/A on November 25, 1997, and incorporated herein by reference.

 (6) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended June 28, 1998, and incorporated herein by
     reference.

 (7) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended December 27, 1998, and incorporated herein by
     reference.

 (8) Previously filed as an exhibit to Registrant's Annual Report on Form 10-K
     for the year ended March 28, 1999, and incorporated herein by reference.

 (9) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended December 26, 1999, and incorporated herein by
     reference.

(10) Previously filed as and exhibit to Registrant's Registration Statement on
     Form 8-A/A dated June 1, 2000, and incorporated herein by reference.

(11) Previously filed as an exhibit to Registrant's Amendment No. 1 to
     Registration Statement on Form S-4 on June 22, 2000, and incorporated
     herein by reference.

(12) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended July 2, 2000, and incorporated herein by
     reference.

(13) Previously filed as an exhibit to Registrant's Annual Report on Form 10-K
     for the year ended April 1, 2001, and incorporated herein by reference.

  *  Compensation plan, contract or arrangement required to be filed as an
     exhibit pursuant to applicable rules of the Securities and Exchange
     Commission.

     (b) Reports on Form 8-K

        None.

                                        18
   21

                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                                          QLOGIC CORPORATION

Date: August 15, 2001                     By:        /s/ H. K. DESAI

                                            ------------------------------------
                                                        H. K. Desai
                                             Chairman, Chief Executive Officer
                                                        and President

                                          By:    /s/ THOMAS R. ANDERSON

                                            ------------------------------------
                                                     Thomas R. Anderson
                                             Vice President and Chief Financial
                                                           Officer
                                            (Principal Financial and Accounting
                                                           Officer)

                                        19
   22
                                 EXHIBIT INDEX

<Table>
<Caption>
EXHIBIT
NUMBER                             ITEM CAPTION
- -------                            ------------
        
 2.1       Distribution Agreement dated as of January 24, 1994 among
           Emulex Corporation, a Delaware corporation, Emulex
           Corporation, a California Corporation and QLogic
           Corporation.(2)
 2.2       Agreement and Plan of Merger dated as of May 8, 2000 by and
           among QLogic Corporation, Amino Acquisition Corp. and Ancor
           Communications, Incorporated.(11)
 3.1       Certificate of Incorporation of Emulex Micro Devices
           Corporation, dated November 13, 1992.(2)
 3.2       EMD Incorporation Agreement, dated as of January 1, 1993.(2)
 3.3       Certificate of Amendment of Certificate of Incorporation,
           dated May 26, 1993.(2)
 3.4       By-Laws of QLogic Corporation.(2)
 3.5       Amendments to By-Laws of QLogic Corporation.(3)
 3.6       Certificate of Amendment of Certificate of Incorporation,
           dated May 26, 1993.(2)
 3.7       Certificate of Amendment of Certificate of Incorporation,
           dated February 15, 1999.(8)
 3.8       Certificate of Amendment of Certificate of Incorporation,
           dated January 5, 2000.(9)
 4.1       Rights Agreement, dated as of June 4, 1996 between QLogic
           Corporation and Harris Trust Company of California, which
           includes as Exhibit B thereto the form of Rights
           Certificate.(4)
 4.2       Amendment to Rights Agreement, dated as of November 19, 1997
           between QLogic Corporation and Harris Trust Company of
           California.(5)
 4.3       Amendment to Rights Agreement, dated as of January 24, 2000
           between QLogic Corporation and Harris Trust Company of
           California.(10)
10.1.2     Form of QLogic Corporation Non-Employee Director Stock
           Option Plan, as amended.(13)
10.2.2     QLogic Corporation Stock Awards Plan, as amended.(13)
10.3       Form of Tax Sharing Agreement among Emulex Corporation, a
           Delaware corporation, Emulex Corporation, a California
           corporation, and QLogic Corporation.(2)
10.4       Administrative Services Agreement, dated as of February 21,
           1993, among Emulex Corporation, a California corporation,
           Emulex Corporation, a Delaware corporation and QLogic
           Corporation.(2)
10.5       Employee Benefits Allocation Agreement, dated as of January
           24, 1994, among Emulex Corporation, a Delaware corporation,
           Emulex Corporation, a California corporation, and QLogic
           Corporation.(2)
10.6       Form of Assignment, Assumption and Consent Re: Lease among
           Emulex Corporation, a California corporation, QLogic
           Corporation and C.J. Segerstrom & Sons, a general
           partnership.(2)
10.7       Intellectual Property Assignment and Licensing Agreement,
           dated as of January 24, 1994, between Emulex Corporation, a
           California Corporation, and QLogic Corporation.(2)
10.8       Form of QLogic Corporation Savings Plan.*(2)
10.9       Form of QLogic Corporation Savings Plan Trust.*(2)
10.11      Form of Indemnification Agreement between QLogic Corporation
           and Directors.(3)
10.13      Industrial Lease Agreement between the Registrant, as
           lessee, and AEW/Parker South, LLC, as lessor.(7)
10.15      Form QLogic Corporation 1998 Employee Stock Purchase
           Plan.(8)
10.16      Loan and Security Agreement with Silicon Valley Bank dated
           March 31, 1994.(1)
10.16.1    Amendment to Loan and Security Agreement with Silicon Valley
           Bank dated July 6, 1998.(6)
10.16.2    Amendment to Loan and Security Agreement with Silicon Valley
           Bank dated July 5, 2001.
21.2       Subsidiaries of the Registrant.(13)
</Table>
   23

- ---------------
 (1) Previously filed as Exhibit 10.10 to Registrant's Annual Report on Form
     10-K for the year ended April 3, 1994 and incorporated herein by reference.

 (2) Previously filed as an exhibit to Registrant's Registration Statement on
     Form 10 on January 28, 1994, and incorporated herein by reference.

 (3) Previously filed as an exhibit to Registrant's Annual Report on Form 10-K
     for the year ended April 2, 1995, and incorporated herein by reference.

 (4) Previously filed as an exhibit to Registrant's Registration Statement on
     Form 8-A on June 19, 1996, and incorporated herein by reference.

 (5) Previously filed as an exhibit to Registrant's Registration Statement on
     Form 8-A/A on November 25, 1997, and incorporated herein by reference.

 (6) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended June 28, 1998, and incorporated herein by
     reference.

 (7) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended December 27, 1998, and incorporated herein by
     reference.

 (8) Previously filed as an exhibit to Registrant's Annual Report on Form 10-K
     for the year ended March 28, 1999, and incorporated herein by reference.

 (9) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended December 26, 1999, and incorporated herein by
     reference.

(10) Previously filed as and exhibit to Registrant's Registration Statement on
     Form 8-A/A dated June 1, 2000, and incorporated herein by reference.

(11) Previously filed as an exhibit to Registrant's Amendment No. 1 to
     Registration Statement on Form S-4 on June 22, 2000, and incorporated
     herein by reference.

(12) Previously filed as an exhibit to Registrant's Quarterly Report on Form
     10-Q for the quarter ended July 2, 2000, and incorporated herein by
     reference.

(13) Previously filed as an exhibit to Registrant's Annual Report on Form 10-K
     for the year ended April 1, 2001, and incorporated herein by reference.

  *  Compensation plan, contract or arrangement required to be filed as an
     exhibit pursuant to applicable rules of the Securities and Exchange
     Commission.