FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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 *   Johnson Russell 2. Date of Event Requiring Statement (Month/Day/Year) 03/27/2007 3. Issuer Name and Ticker or Trading Symbol ADAPTEC INC [ADPT] (Last) (First) (Middle) 691 SOUTH MILPITAS BLVD. 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP World Wide Sales 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) MILPITAS, CA 95035 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 21,066 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Incentive Stock Option (right to buy)	12/19/2005(1)	09/19/2010	Common Stock	4,764	$ 3.45	D	Â
Incentive Stock Option (right to buy)	10/25/2005(1)	05/25/2010	Common Stock	5,401	$ 3.93	D	Â
Incentive Stock Option (right to buy)	09/14/2006(2)	06/14/2013	Common Stock	10,000	$ 4.24	D	Â
Incentive Stock Option (right to buy)	02/13/2007(3)	11/13/2013	Common Stock	10,000	$ 4.48	D	Â
Incentive Stock Option (right to buy)	12/30/2002(1)	09/30/2009	Common Stock	9,000	$ 4.511	D	Â
Incentive Stock Option (right to buy)	03/31/2005(4)	12/17/2009	Common Stock	17,810	$ 7.66	D	Â
Incentive Stock Option (right to buy)	05/21/2004(5)	02/21/2011	Common Stock	7,000	$ 9.31	D	Â
Incentive Stock Option (right to buy)	11/07/1998(1)	08/07/2008	Common Stock	2,825	$ 10.875	D	Â
Incentive Stock Option (right to buy)	07/10/2002(6)	04/10/2009	Common Stock	6,370	$ 12.21	D	Â
Incentive Stock Option (right to buy)	02/13/2003(1)	11/13/2007	Common Stock	5,997	$ 13.375	D	Â
Incentive Stock Option (right to buy)	04/23/2002(1)	01/23/2009	Common Stock	7,000	$ 15.97	D	Â
Non-Qualified Stock Option (right to buy)	12/19/2005(1)	09/19/2010	Common Stock	35,236	$ 3.45	D	Â
Non-Qualified Stock Option (right to buy)	10/25/2005(1)	05/25/2010	Common Stock	5,399	$ 3.93	D	Â
Non-Qualified Stock Option (right to buy)	09/14/2006(2)	06/14/2013	Common Stock	10,000	$ 4.24	D	Â
Non-Qualified Stock Option (right to buy)	02/13/2007(3)	11/13/2013	Common Stock	5,000	$ 4.48	D	Â
Non-Qualified Stock Option (right to buy)	08/04/2003(7)	08/04/2010	Common Stock	7,500	$ 6.3	D	Â
Non-Qualified Stock Option (right to buy)	03/31/2005(4)	12/17/2009	Common Stock	190	$ 7.66	D	Â
Non-Qualified Stock Option (right to buy)	05/22/2001(1)	11/22/2010	Common Stock	6,000	$ 11.9375	D	Â
Non-Qualified Stock Option (right to buy)	10/21/1998(1)	07/10/2007	Common Stock	3,000	$ 12.5	D	Â
Non-Qualified Stock Option (right to buy)	10/21/1998(1)	07/06/2008	Common Stock	5,650	$ 12.5	D	Â
Non-Qualified Stock Option (right to buy)	01/01/2000(1)	10/21/2008	Common Stock	200	$ 12.5	D	Â
Non-Qualified Stock Option (right to buy)	11/13/2001(1)	11/13/2007	Common Stock	503	$ 13.375	D	Â
Non-Qualified Stock Option (right to buy)	12/28/2001(1)	12/28/2008	Common Stock	4,517	$ 14.9	D	Â
Non-Qualified Stock Option (right to buy)	12/27/2001(1)	12/27/2008	Common Stock	11,150	$ 15.29	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Johnson Russell 691 SOUTH MILPITAS BLVD. MILPITAS, CA 95035	Â	Â	  VP World Wide Sales	Â

Signatures

By: John Westfield For: Russell Johnson		04/05/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	Options were fully vested prior to becoming a reporting officer.
(2)	A total of 20,000 stock options were granted on 06/14/2006, of which 10,000 are Incentive Stock Options and 10,000 are Non-Qualified Stock Options. The aggregate of these options vest at a rate of 8.33% of the total option shares at the end of each three month period, such that the total option shares will be fully vested on 06/14/2009.
(3)	A total of 15,000 stock options were granted on 11/13/2006, of which 10,000 are Incentive Stock Options and 5,000 are Non-Qualified Stock Options. The aggregate of these options vest at a rate of 8.33% of the total option shares at the end of each three month period, such that the total option shares will be fully vested on 11/13/2009.
(4)	A total of 18,000 stock options were granted on 12/17/2004, of which 17,810 are Incentive Stock Options and 190 are Non-Qualified Stock Options. These options have two vesting schedules, of which 8,000 stock options fully vested on 3/31/2007. The remainder 10,000 stock options vest at a rate of 25% on 3/31/2005 and an additional 8.33% of the total option shares at the end of each three month period thereafter, such that the total option shares will be fully vested on 3/31/2008.
(5)	A total of 7,000 stock options were granted on 02/21/2004. These options vest at a rate of 5% of the total option shares at the end of each three month period, such that the total option shares will be fully vested on 02/21/2009.
(6)	A total of 6,370 stock options were granted on 04/10/2002. These options vest at a rate of 5% of the total option shares at the end of each three month period, such that the total option shares will be fully vested on 04/10/2007.
(7)	A total of 7,500 stock options were granted on 08/04/2003. These options vest at a rate of 20% on 08/04/2003 and an additional 5% of the total option shares at the end of each three month period thereafter, such that the total option shares will be fully vested on 08/04/2007.

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