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                                                                 EXHIBIT 10.36.3

SIGNATURE VERSION


                  Third Amended and Restated ATTACHMENT No. 1
     To the Agreement for Fabrication and Purchase of Semiconductor Products

                                                        Agreement Number: 000690
Customer Name:  Western Digital Technologies, Inc.      Customer Number:    WD 1


The parties agree that Attachment No. 1 under the Agreement for Fabrication and
Purchase of Semiconductor Products between Western Digital Technologies, Inc.
(f/k/a Western Digital Corporation) ("Buyer") and International Business
Machines Corporation ("IBM") with Agreement No. 000690 is amended and restated
as of June 19, 2002 (the "Attachment Effective Date") in its entirety to read as
follows:

               PRODUCT PURCHASE INFORMATION AND SPECIFICATIONS FOR
                     THE I295TLC, TALON and REDWING PRODUCTS

1.0  Product Description and Specifications:

                                     TABLE I


                                                    
Product Name                 I295TLC                      Talon

Product Type                 ASIC (1)                     Read Channel
ASIC Family                  SA27E                        Not applicable
Process Technology           CMOS7SF/4LM                  CMOS 7SF/4LM
Ldrawn                       0.15um                       0.15um
Chip Size (mm)               4.23x4.23                    2.79x2.85
Package Description          176LQFP(2)                   80TQFP-EP

Product Name                 Redwing

Product Type                 Read Channel
ASIC(1) Family               Not applicable
Process Technology           CMOS 7SF/4LM
Ldrawn                       0.15um
Chip Size (mm)               3.0611 x 2.7388
Package Description          80TQFP-EP


(1) Application Specific Integrated Circuit

(2) 24x24mm body size, 0.5mm OLB pitch, 1.6mm height


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2.0  Volume Purchase Commitments for Talon and I295TLC Chipset in 2002

        2.1    For purposes of this Section 2.0, Chipset shall mean the
               combination of one Unit of the Talon and one Unit of the I295TLC
               Product.

        2.2    Buyer agrees to purchase the minimum amounts of Chipsets to be
               shipped and invoiced during the calendar quarters listed below in
               TABLE III. As of the Attachment Effective Date, Buyer has already
               placed Blanket Purchase Orders consistent with this Section 2.2
               and TABLE III. Buyer shall forecast and set delivery schedules
               and IBM shall deliver the Chipsets in accordance with the JIT
               Program Supplement attached hereto; provided that Buyer may
               reschedule the delivery of the Chipsets in accordance with
               Section 4 of the JIT Supplement attached hereto, except that the
               rescheduled Shipment Date may not fall on a date outside of the
               calendar quarter of the originally scheduled Shipment Date,
               unless both parties agree in writing. The prices listed below in
               TABLE III shall apply to the Chipsets shipped during the
               respective calendar quarters listed in TABLE III. Notwithstanding
               the cancellation charges set forth in Section 7.3 (a) and (b) of
               this Attachment 1, Buyer will pay the applicable cancellation
               charge as indicated in TABLE II below for any cancellation of the
               Purchase Orders for its minimum purchase commitment as set forth
               in this Section 2.2. The Cancellation Fee in TABLE II below is
               the percentage of the price for any Product for which Buyer
               cancelled the Purchase Order.

                                    TABLE II


                                          
[***]                                        [***]
- ---------------------------------------------------------------------------------------
              [***]                                       [***]
- ---------------------------------------------------------------------------------------



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                                    TABLE III



                                             I295TLC Unit     Talon Unit
Quarter    Product    Volume+    Price*      Price            Price**        Payment Terms
- ----------------------------------------------------------------------------------------------
                                                           
1Q'02      Chipset    [***]       $[***]      $[***]           $[***]          Net [***] days++
                      [***]       $[***]      $[***]           $[***]          Net [***] days+++

2Q'02      Chipset    [***]       $[***]      $[***]           $[***]          Net [***] days***
                      [***]       $[***]      $[***]           $[***]          Net [***] days

3Q'02      Chipset    [***]       $[***]      $[***]           $[***]          Net [***] days****

4Q'02      Chipset    [***]       $[***]      $[***]           $[***]          Net [***] days
- ----------------------------------------------------------------------------------------------


                 + [***].

                 * The price stated is the price for one (1) Chipset.

                 ** The Talon Unit price applies only when Buyer purchases a
                 complete Chipset.

                 ++ [***] of the [***] of the 1Q'02 I295TLC Product was shipped
                 December of 2001 with net [***] day payment terms.

                 +++ For this Purchase Order of [***] Chipsets, if all [***]
                 Chipsets are shipped on the last day of the first calendar
                 quarter of 2002, the payment terms shall be net [***] days.

                 *** The [***] Units of the I295TLC Product will be shipped in
                 March 2002, at a price of $[***] and with net [***] day payment
                 terms [***] Units of the Chipset, the [***] Talons, shall be
                 shipped in the second calendar quarter of 2002 in accordance
                 with the JIT Program Supplement. The price for such Talons
                 shall be $[***] and the payment terms shall be net [***] days.

                 **** Notwithstanding the foregoing, Buyer agrees that IBM will
                 ship the [***] I295TLC Products to Buyer on June 29, 2002 or
                 June 30, 2002, with net [***] day payment terms.


               2.3 In addition to those volumes listed in Table III, Buyer also
               agrees to purchase the minimum amounts of Talon, I295TLC, and
               Redwing Product to be shipped and invoiced during the calendar
               quarters listed below in TABLE IV; provided, however, that as to
               the Talon Product required to be purchased in the third quarter
               and fourth quarter of 2002 and the first quarter of 2003, Buyer
               may request the shipment of up to an aggregate of [***] Units on
               the last day of the third


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               quarter of 2002, up to an aggregate of [***] Units the last day
               of the fourth quarter of 2002, and up to an aggregate of [***]
               Units the last day of the first quarter of 2003, in accordance
               with Section 4 of the JIT Program Supplement attached hereto.
               [***] Units may be rescheduled by Buyer in accordance with
               Section 4 of the JIT Program Supplement, except that the
               rescheduled delivery date may not fall on a day outside the
               calendar quarter that corresponds to the Product in Table IV,
               unless both parties agree in writing. Notwithstanding the
               foregoing sentence, Buyer may reschedule [***] Units of the Talon
               Product to be delivered in the first calendar quarter of 2003 in
               accordance with the terms of JIT Program Supplement. No later
               than five business days after the Attachment Effective Date,
               Buyer shall place Blanket Purchase Orders consistent with this
               Section 2.3 and TABLE IV for the Redwing and I295TLC Product and
               change orders for the Talon Product. IBM will accept such Blanket
               Purchase Orders and change orders without regard to leadtime
               requirements or imposition of cancellation fees, provided that
               Buyer submits such Purchase Order within five business days after
               the Attachment Effective Date. Buyer shall forecast and set
               delivery schedules and IBM shall deliver the Product in
               accordance with the JIT Program Supplement attached hereto. The
               prices listed below in TABLE IV shall apply to the Talon,
               I295TLC, and Redwing Product to be shipped during the respective
               calendar quarters listed in TABLE IV. Notwithstanding the
               cancellation charges set forth in Section 7.3 (a) and (b) of this
               Attachment 1, Buyer will pay the applicable cancellation charge
               as indicated in TABLE II above for any cancellation of any
               Purchase Order or any failure to issue Purchase Orders as set
               forth in this Section 2.3. The Cancellation Fee in TABLE II above
               is [***] for any Product for which Buyer cancelled the Purchase
               Order or failed to issue a Purchase Order.

                                    TABLE IV



Quarter           Product        Volume+        Price per Unit    Payment Terms
- --------------------------------------------------------------------------------
                                                      
2Q'02             Talon          [***]          $[***]            Net [***] days

2Q'02             Talon          [***]          $[***]            Net [***] days

3Q'02             Talon          [***]          $[***]            Net [***] days

3Q'02             Redwing        [***]          $[***]            Net [***] days

4Q'02             Talon          [***]          $[***]            Net [***] days

4Q'02             Redwing        [***]          $[***]            Net [***] days

4Q'02             I295TLC        [***]          $[***]            Net [***] days

1Q'03             Talon          [***]          $[***]            Net [***] days


                 + [***]

2.4     Intentionally Blank.


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SIGNATURE VERSION

2.5     Notwithstanding the cancellation fees set forth in TABLE II above,
        Buyer's obligations to pay the cancellation fees in TABLE II shall be
        subject to the following. IBM may start manufacturing the Chipsets set
        forth in TABLE III and the Talon, I 295TLC and Redwing Product set forth
        in TABLE IV at any time. However, if IBM, without Buyer's express prior
        written approval commences manufacturing the Chipsets or the Talon, I
        295TLC and Redwing Products outside of [***] times the Purchase Order
        Lead Time as shown in Section 6.0 and Buyer cancels such Chipsets and/or
        Products before they are within [***] times the Purchase Order Lead
        Time, then Buyer's only obligation is to pay a [***] cancellation fee
        for such cancelled Product.

2.6     Cancellation Procedures for Chipsets in TABLE III and the Talon, I
        295TLC and Redwing Products in Table IV: In the event that Buyer cancels
        Chipsets in TABLE III or the Talon, I 295TLC, or Redwing Products in
        TABLE IV under this Section 2.6, the following cancellation procedures
        will apply:

               2.6.1  Buyer shall provide IBM with written notice of the
                      cancellation, specifying the number of Units to be
                      cancelled and for which calendar quarter such cancellation
                      applies;

               2.6.2  IBM shall provide Buyer with a written notice stating the
                      number of Units (if any) for which it had started wafers
                      and the total amount of the cancellation charge, which
                      shall be due [***] days after IBM provides such notice;

               2.6.3  [***]

               2.6.4  [***]

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SIGNATURE VERSION
                      [***]

               2.6.5  [***]

3.0     [***]

        3.1    [***]

        3.2    Buyer shall pay the following cancellation charges for the
               cancellation of any purchase order issued under Section 3.1 or
               for any reduction to such purchase order to the extent of such
               reduction:

                       Cancellation Schedule for Products
             To Be Delivered in the Second Calendar Quarter of 2003





              [***]                                                         [***]
              ----------------------------------------- ------------------------------------------------
                                                     
                             [***]                                            [***]

                             [***]                                            [***]

                             [***]                                            [***]



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        3.3    The price for the Talon Products to be delivered under this
               Section 3.0 (including the Talon Demand) shall be $[***] per
               Unit. The payment terms are net [***] days.

        3.4    [***]

4.0     Product Price

        4.1    For all Product sold under this Attachment, the Product price
               will be held firm and will not be increased on Purchase Orders
               accepted by IBM. IBM agrees to discuss Prices at Buyer's request.

        4.2    For all Product sold under this Attachment, unless otherwise
               specified, the prices set forth in this Agreement do not include
               taxes, duties and freight charges. If applicable, taxes, duties
               and freight charges will appear as separate additional items on
               IBM's invoice, but failure to include any tax, duty or freight
               charge shall not affect Buyer's responsibility for such.

        4.3    For Products that are not sold as part of a Chipset in Section
               2.2 or as part of the volume purchase commitment in Section 2.3
               and Section 3.1, the Product Unit


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SIGNATURE VERSION

               pricing for I295TLC, Talon and Redwing below applies to Product
               shipped during the applicable calendar quarter.



                            I295TLC         Talon          Redwing
                            -------         -----          -------
                                               
               Q4'01         $[***]         $[***]          [***]
               Q1'02         $[***]         $[***]          [***]
               Q2'02         $[***]         $[***]          [***]
               Q3'02         $[***]         $[***]         $[***]
               Q4'02         $[***]         $[***]         $[***]


            *  [***] Units of Talon Product shipped in March 2002 shall have a
               purchase price of $[***] each and shall have net [***] day
               payment terms.

5.0     Purchase Orders

        [***] Purchase Orders must be placed in advance, with at least the
        Purchase Order Lead Time specified in Section 6.0, to allow IBM to meet
        Buyer's requested Shipment Date. Buyer may request an improved shipment
        date, however, such request is subject to acceptance by IBM.

6.0     Purchase Order Lead Time:



               Product       Purchase Order Lead Time/Weeks
               -------       ------------------------------
                       
               I295TLC       [***] weeks

               Talon         [***] weeks

               Redwing       [***] weeks


               Notwithstanding any other term of this Agreement, the Purchase
               Order Lead Times above do not include the time in which IBM has
               to reply to Buyer's Purchase Order.

7.0     Cancellation, Change Orders and Rescheduling Provisions for Products

        7.1    Buyer may cancel or alter a Purchase Order or any portion thereof
               upon written notice to IBM. In any such event, a cancellation
               charge will immediately become due for each cancelled Unit or
               Chipset as specified under this Agreement.

        7.2    [***]


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               [***]

               [***]

        7.3    The cancellation charges for Chipsets ordered pursuant to Section
               2.2 and TABLE III, the Talon, Redwing, and I295TLC Product
               ordered pursuant to Section 2.3 and TABLE IV, and [***] pursuant
               to Section 5 of the JIT Supplement are stated in Section 2.2,
               TABLE II and Section 2.5. The cancellation charges for Talon
               Product ordered pursuant to Section 3.1 are stated in Section
               3.2. Cancellation charges for any additional I295TLC, Redwing,
               and Talon Products ordered are as follows:

               [***]

               [***]

        7.4    Buyer may issue change orders to previously accepted Purchase
               Orders for IBM's acceptance. In such change orders, Buyer may
               request (1) an increase or decrease of quantity of Products it
               ordered; (2) different Product from the Product originally
               ordered or (3) an earlier delivery date. IBM may accept or reject
               the change order. In the event that IBM accepts or is required to
               accept a change order, the newly accepted change order becomes an
               accepted Purchase Order, replacing the original Purchase Order.
               Notwithstanding the above, Buyer reserves the right to reschedule
               deliveries per Sections 2.2 and 2.3 of this Attachment 1 and
               Section 4 of the JIT Program Supplement attached hereto. If a
               change order is identified as exercising this reschedule right,
               IBM will accept that change order per the conditions set forth in
               the relevant sections.

8.0     Shipment

        8.1    The delivery terms for Products are as stated in the table below,
               with title passing to Buyer upon shipment from the "Shipment
               From" location in the table. For shipments


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               not covered by the table below, Buyer is responsible for all
               freight and duty charges from IBM's shipping location and title
               and risk of loss pass to the Buyer upon tender to the carrier for
               shipment to the Buyer.



                SHIPMENTS FROM         SHIPMENTS TO           INCOTERM*
                --------------------------------------------------------------
                                                
                [***]                [***]            [***]

                [***]                [***]            [***]

                [***]                [***]            [***]

                [***]                [***]            [***]


               * As defined in ICC 2000 Incoterms.

        8.2    [***]

9.0     Quality Assurance

        9.1    IBM will follow its standard workmanship and quality assurance
               procedures for Products sold under this Agreement.

        9.2    [***]

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               [***]

        9.3    [***]


                       
               [***]


               [***]

10.0    Warranty Period

        The Warranty Period for Products under this Attachment is [***]
        years from delivery. For purposes of this Section 10, delivery to Buyer
        of each Unit is deemed to occur five (5) days after shipment from IBM's
        plant or distribution point.

11.0    Redwing NRE

        11.1   Buyer shall make payments for a nonrecurring engineering ("NRE")
               charge of $[***] for the development of the Redwing Product,
               which shall be due in $[***] increments upon the following
               dates:


                              
                             1Q'02: 02/15/02
                             2Q'02: 05/15/02
                             3Q02:  08/15/02
                             4Q02:  11/15/02


        11.2   Prior to the Attachment Effective Date, Buyer submitted a
               purchase order for the entire NRE charge of $[***] and has
               already made the $[***] payments due in each of the first
               and second quarters of 2002. Neither party may cancel the Redwing
               NRE.

        11.3   [***]

12.0    Notices


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SIGNATURE VERSION

        All notices required to be given under this Agreement will be in writing
        and deemed given if sent postage prepaid or by facsimile transmission
        (FAX), receipt confirmed by intended recipient, to the parties as
        follows:


                                      
        IBM:                                BUYER:

        IBM Corp.                           Western Digital Technologies, Inc.
        Attn: Contract Administrator        Attn: General Counsel
        1000 River Street, 965-3B           20511 Lake Forest Drive
        Essex Jct., Vermont  05452          Lake Forest, California 92630
        Fax: [***]                          Fax: (949)-672-5444


13.0    No Other Amendment or Modification. This Third Amended and Restated
        Attachment No. 1 amends and restates the Second Amended and Restated
        Attachment No. 1 with an Attachment Effective Date of April 11, 2002.
        IBM previously retracted and agreed that the Second Amended and Restated
        Attachment No. 1 superseded IBM's letter dated March 1, 2002 as to the
        discontinuance of the I295TLC, Talon and Redwing Products. Accordingly,
        those Products have not been discontinued. Except as expressly set forth
        in this Third Amended and Restated Attachment No. 1, the Agreement, as
        amended by Amendment No. 1 dated December 18, 2001 and Amendment 2 dated
        June 19, 2002, remains in full force and effect without further
        modification. The terms and conditions of the Agreement, as amended, and
        this Third Amended and Restated Attachment No. 1 shall not be further
        modified or amended except by a writing signed by authorized
        representatives of both parties.


ACCEPTED AND AGREED TO AS OF THE ATTACHMENT EFFECTIVE DATE:

Western Digital Technologies, Inc.       International Business Machines
                                           Corporation

By:    /s/ Thomas Nieto                  By:     /s/ John G. Beiswenger
       ------------------------------            -------------------------------

Name:  Thomas Nieto                      Name:   John G. Beiswenger
       ------------------------------            -------------------------------
           (print or type name)

                                                 Exec. Mgr., MD WW Contracts &
Title: V.P., Materials                   Title:  Business Practices, IBM TG
       ------------------------------            -------------------------------
           (print or type title)


Date:  19-June '02                       Date:   June 19, 2002
       ------------------------------            -------------------------------



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SIGNATURE VERSION

                      JUST-IN-TIME (JIT) PROGRAM SUPPLEMENT
     TO THE AGREEMENT FOR FABRICATION AND PURCHASE OF SEMICONDUCTOR PRODUCTS

[***]

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[***]


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[***]

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[***]



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[***]


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SIGNATURE VERSION

[***]


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