Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
PETERSON GLEN A
   2. Issuer Name and Ticker or Trading Symbol
SEAGATE TECHNOLOGY [STX] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Sr. VP, Worldwide Finance
(Last)
(First)
(Middle)
920 DISC DRIVE, ATTN: STOCK PLAN ADMINISTRATION		 3. Date of Earliest Transaction (Month/Day/Year)
09/27/2005
(Street)

SCOTTS VALLEY, CA 95067		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Shares               37,655 (1) (2) D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
NQ Stock Option $ 15.065 09/27/2005   A   32,500   09/27/2006(3) 09/27/2012 Common Shares 32,500 $ 15.065 32,500 D  
NQ Stock Option $ 2.3             11/22/2001(4) 07/24/2011 Common Shares 1,088   1,088 D  
NQ Stock Option $ 5             01/31/2006(5) 01/31/2012 Common shares 220,000   220,000 D  
NQ Stock Option $ 19.735             01/05/2005(6) 01/05/2014 Common shares 50,000   50,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
PETERSON GLEN A
920 DISC DRIVE
ATTN: STOCK PLAN ADMINISTRATION
SCOTTS VALLEY, CA 95067		       Sr. VP, Worldwide Finance  

Signatures

 /S/ Roberta S. Cohen for Glen A. Peterson   09/29/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Includes 989 common shares, par value $0.00001 per share (the "Common Shares") of Seagate Technology (the "Issuer") acquired on January 31, 2005 and 980 Common Shares acquired on July 29, 2005 under the Employee Stock Purchase Plan.
(2) Includes an aggregate of 34,878 Common Shares received by the Reporting Person from New SAC as part of the May 16, 2005 and July 26, 2005 distributions by New SAC of the Issuer's Common Shares to the New SAC shareholders on a pro rata basis in the form of a stock dividend (the "Distributions"). The Reporting Person's receipt of the the Common Shares through the Distributions were exempt from the reporting and liability provisions of Section 16 pursuant to Rule 16a-9.
(3) Options granted to the Reporting Person under the Issuer's 2004 Stock Compensation Plan are subject to a four-year vesting schedule. One quarter of the option shares will vest on September 27, 2006. The remaining option shares will vest proportionally each month over the 36 months following September 27, 2006.
(4) Options granted to the Reporting Person under the Issuer's 2001 Share Option Plan are subject to a four-year vesting schedule. One quarter of the option shares vested on November 22, 2001. The balance of the option shares vested monthly proportionately over the 36 months following November 22, 2001.
(5) Options granted to the Reporting Person under the Issuer's 2001 Share Option Plan are subject to a five-year vesting schedule. One fifth of the option shares will vest on January 31, 2006. The remaining option shares will vest on January 31, 2007.
(6) Options granted to the Reporting Person under the Issuer's 2001 Share Option Plan are subject to a five-year vesting schedule. One fifth of the option shares vested on January 5, 2005. The remaining option shares are vesting proportionally each month over the 48 months following January 5, 2005.

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