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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1. Name and Address of Reporting Person * Whitmore Robert W   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. Vice President (Last) (First) (Middle) SEAGATE TECHNOLOGY, 920 DISC DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 03/24/2005 (Street) SCOTTS VALLEY, CA 95066 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 03/24/2005   M   20,000 A $ 2.3 20,000 D   Common Shares 03/24/2005   S   20,000 D $ 20 (1) 0 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

$ 2.3

03/24/2005

M

20,000

11/22/2001(2)

07/24/2011

Common Shares

20,000

$ 2.3

24,435

D

NQ Stock Option

$ 5

01/31/2006(3)

01/31/2012

Common Shares

250,000

250,000

D

NQ Stock Option

$ 10

09/16/2003(4)

09/16/2012

Common Shares

100,000

100,000

D

NQ Stock Option

$ 10

09/16/2006(5)

09/16/2012

Common Shares

150,000

150,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Whitmore Robert W SEAGATE TECHNOLOGY 920 DISC DRIVE SCOTTS VALLEY, CA 95066			Sr. Vice President

Signatures

/s/ Roberta S. Cohen for Robert W Whitmore		03/24/2005
**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)	The sale reported on this Form 4 were effective pursuant to a 10b5-1 trading plan adopted by the reporting person on November 24, 2004.
(2)	Options granted to the Reporting Person under the 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 are fully vested and vested monthly proportionately over the 36 months following November 22, 2001.
(3)	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 (80%) will vest on January 31, 2007.
(4)	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 September 16, 2003. The remaining option shares are vesting and will continue vest propotionally each month over the 48 months following September 16, 2003.
(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 vested on September 16, 2006. The remaining option shares (80%) will vest on September 16, 2007.

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