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                                                                  EXHIBIT 10.15


October 18, 1995

Mr. Joseph F. Pleso
1152 Timberline Lane
Santa Ana, CA 92705

Dear Mr. Pleso:

         This letter confirms the following agreements with you regarding
termination of your employment with QLogic Corporation, a Delaware corporation
("QLogic"):

         1. It is acknowledged that on October 10, 1995 (the "Termination Date")
you resigned as an employee and officer of QLogic and any or all of its
subsidiaries or affiliates.

         2. You will be paid your base salary, sales commissions, allowances,
and benefits for your services as an employee of QLogic, as in effect
immediately prior to the Termination Date, for your services through the
Termination Date.

You will not accrue any additional compensation or entitlement to any employee
benefits or be entitled to receive vacation or sick leave benefits after the
Termination Date except as expressly provided herein. You will also not receive
any bonus for services prior to the Termination Date or sales commissions in
respect of sales after the Termination Date. Sales commissions otherwise payable
to you in respect of sales prior to the Termination Date will be subject to
adjustment for returns, credits, bad debts, and other like events after the
Termination Date.

         3. After the Termination Date, QLogic will provide you with gross
separation payments equal to the regular amount of your prorated base salary for
each payroll period, as in effect immediately prior to the Termination Date.
Such separation payments shall be payable over the six (6) month period
commencing October 11, 1995 and ending April 10, 1996 (the "Separation Payment
Period") and shall be paid in equal installments on the customary QLogic salary
payment days. Such separation payments are beyond that provided by QLogic policy
or by law. There will, of course, be deductions and withholdings from the gross
amount for applicable federal, state and local income and employment

                               QLOGIC CORPORATION

                                3545 HARBOR BLVD.

                              COSTA MESA, CA 92626

                           714.438.2200, 800.662.4471
                                F\X: 714.668.5090
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Mr. Joseph F. Pleso
October 18, 1995
PAGE 2

taxes, FICA, etc. Unless you make other arrangements with QLogic, checks will be
mailed to your home or deposited in your bank if you so designate.

         4. After the Termination Date, the group health benefits you were
receiving as of the Termination Date will cease.

You may extend after the Termination Date, for yourself and your covered
dependents, the group health coverage that you were receiving as of the
Termination Date by selecting COBRA coverage.

You can only extend the type of coverage in effect as of the Termination Date,
without any additions, deletions, or modifications. If you elect to continue
your coverage under COBRA, QLogic will pay the applicable premiums for yourself
and your electing covered dependents through the end of the Separation Payment
Period. After the end of the Separation Payment Period, in order to continue
coverage under COBRA, you will be required to pay the full amount of the
applicable premium cost of providing benefits and an additional administrative
charge. The payment of the applicable premium through the end of the Separation
Payment Period will be contingent on your continued eligibility for COBRA
continuation coverage and will not operate to extend the continuation coverage
period required by the provisions of applicable law.

         5. Anything set forth in this letter to the contrary notwithstanding,
if you accept and commence part-time or full-time employment (as an employee,
consultant, or otherwise) with any other employer prior to the end of the
Separation Payment Period, the compensation, benefits and payments QLogic would
otherwise be obligated to provide to you under this agreement will be reduced to
the extent of, and by amounts equal to, the total compensation and economic
value of benefits received by you from such other employer for your services
prior to the end of the Separation Payment Period. You will promptly report any
such other employment, compensation, and benefits to QLogic.

         6. The payments and benefits provided for you above shall be in lieu of
and in full satisfaction of any and all obligations of QLogic and any and all
other rights you may OTHERWISE HAVE to compensation and benefits from QLogic,
including, without limitation, any and all rights to compensation or benefits
under or with respect to the management bonus plan, the cash profit sharing
plan, the discretionary bonus plan, the
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Mr. Joseph F. Pleso
October 18, 1995
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employee stock option plan, vacation, sick leave, and the like; provided.
however, that the indemnification obligations of QLogic to you with respect to
your actions or omissions as an employee or officer of QLogic or its affiliates
shall remain and continue, without change or amendment, and shall survive this
agreement.

         7. On or before October 18, 1995, you will return and/or account for
all QLogic property in your possession, including, without limitation, i.d.
badge, keys, credit cards (telephone, car rental, air travel, etc.) manuals,
supplies, equipment, etc. You will also promptly transfer to QLogic any and all
club memberships purchased by QLogic on your behalf or offered to you as a
result of your employment status with QLogic.

         8. You will submit to QLogic, within a reasonable period of time, all
outstanding business expenses for reconciliation and reimbursement. QLogic will
pay only for business expenses incurred prior to the Termination Date and only
according to its established expense reimbursement policy.

         9. Before you begin a new employment position, you will inform QLogic
of the name and address of your new employer and the expected date of
commencement of your new employment. You will also inform QLogic if you change
your residence address and/or telephone number so that contact may be maintained
with you at all times during the term of this agreement.

         10. You hereby forever release and discharge QLogic, all of its
respective subsidiaries, and all of their successors, affiliates, assigns,
employees, former employees, attorneys, agents, officers, directors, and
shareholders from any and all causes of actions, judgments, liens, indebtedness,
damages, losses, claims, liabilities, and demands of every kind and character,
known or unknown, suspected, or unsuspected, absolute or contingent, prior to
the date of execution of this agreement including but not limited to claims
arising out of or in any manner relating to (i) your employment with QLogic,
your position as an officer of QLogic, and/or termination of such employment or
positions; (ii) any restrictions on the right of QLogic or any of the released
parties to terminate employees; (iii) any common law claims or actions; (iv) any
statements made by any of the released parties; (v) any federal, state, or
governmental statute, regulation, or ordinance, including, without limitation,
title VII
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Mr. Joseph F. Pleso
October 18, 1995
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of the Civil Rights Act of 1964, the Age Discrimination in Employment Act, the
California Fair Employment and Housing Act, and claims with any division of the
California Department of Industrial Relations or Employment department, or (vi)
the Key Employee Retention Agreement and Assignment of Agreement, if applicable.
You hereby waive any and all rights you may have under California Civil Code
Section 1542 (or any analogous state law or federal law or regulation) which
provides:

A general release does not extend to claims which the creditor does not know or
suspect to exist in his favor at the time of executing the release, which if
known by him must have materially affected his settlement with the debtor.

         The foregoing release does not apply to any of the obligations of
QLogic under this agreement, the indemnification obligations of QLogic referred
to in Paragraph 6 above, your employee stock option agreement(s), or the QLogic
retirement savings plan.

         11. It is understood and agreed that this agreement is fully
integrated, represents the entire understanding of the parties, and there are no
other agreements, representations, promises, or negotiations which have not been
expressly set forth herein except for the Technical/Professional Employee
Invention and Nondisclosure Agreement previously executed by you, any
outstanding stock option agreements, and any other employee benefit plans
sponsored by QLogic in which you were participating as of the Termination Date
which will remain in effect in accordance with their terms after termination of
your employment as provided therein. Nothing contained herein shall constitute
or imply any admission of liability or wrongdoing by any party. This agreement
can be amended, modified, or terminated only by an instrument in writing
executed by you and the chief executive officer of QLogic.

         12. You agree that you are still bound by the Technical/Professional
Employee Invention and Nondisclosure Agreement which you previously executed.
You further agree and understand that pursuant to said agreement and/or this
agreement you are prohibited for a period of two years from employing or
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Mr. Joseph F. Pleso
October 18, 1995
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attempting to employ in competition with QLogic any of QLogic's employees. You
further agree that you will not in any way disparage QLogic or any of its
employees or directors, or engage in any conduct adverse to QLogic's interests,
including but not limited to the disclosure to competitor-s or diversion or
attempted diversion by solicitation or any other means of any of QLogic's
business opportunities existing, identified or for which discussions were
initiated prior to the Termination Date, confidential information, technology or
proprietary rights. Should you violate this or any other provision of this
agreement, you understand and agree that you will forfeit any and all remaining
payments under this agreement.

13. It is understood and agreed that:

                  a. In the event of any dispute, controversy, or claim
concerning this agreement, its validity, interpretation, enforcement, or breach,
the prevailing party, in addition to all other legal or equitable remedies
possessed, shall recover his or its reasonable attorneys fees and costs in
connection with any such dispute, controversy, or claim. Any such dispute,
controversy, or claim shall be resolved by arbitration in the City of Costa
Mesa, California, in accordance with the then existing commercial arbitration
rules of the American Arbitration Association, and judgment upon any award
rendered by the arbitrator(s) may be entered by any state or federal COURT
HAVING jurisdiction thereof. The arbitrator shall have the authority only to
enforce the legal and contractual rights of the parties and shall not add to
modify, disregard or refuse to enforce any contractual provision. The arbitrator
shall have no right, power or jurisdiction to award a party any punitive or
exemplary damages of any kind. The parties acknowledge and agree that by
entering into this agreement they are agreeing to this arbitration provision and
are waiving all rights to a trial by jury. The provisions of California Code of
Civil Procedure Sections 1281, et seq. govern this arbitration provision. The
parties intend that this agreement to arbitrate shall be valid, enforceable, and
irrevocable.

                  b. This paragraph 13 shall only operate to require arbitration
of claims for money damages. Should a party wish to seek injunctive or other
non-monetary relief, those claims shall be brought in a court of competent
jurisdiction.
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Mr. Joseph F. Pleso
October 18, 1995
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14. It is understood, acknowledged, and agreed that:

                  a. In consideration of the additional separation payments
provided hereunder, which payments and benefits are beyond those provided by
QLogic policy or by law, you after knowingly and voluntarily waiving various
rights and claims, including any possible claims for age discrimination under
the federal law known as the Age Discrimination and Employment Act of 1967, as
amended. You understand that this waiver does not extend to rights or claims
that may arise after the date this agreement is executed.

                  b. You have been given a period of at least 21 days within
which to consider this letter agreement, and you have consulted with an attorney
regarding it.

                  c. You understand that you may revoke this letter agreement
within seven days following its execution, and that this letter agreement shall
not become effective or enforceable Until this seven-day revocation period has
expired.

         15. Should any portion, word, clause, phrase, sentence or paragraph of
this letter agreement be declared void or unenforceable, such portion shall be
considered independent and severable from the agreement, the validity of which
shall remain unaffected.

         Please confirm your agreement to the foregoing by dating and signing
this letter agreement where indicated below and returning a signed copy to
QLogic.

Sincerely,

QLOGIC CORPORATION


By:
   H. K. Desai
   President