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 * STEEL PARTNERS II LP   2. Issuer Name and Ticker or Trading Symbol ADAPTEC INC [ADPT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 590 MADISON AVENUE, 32ND FLOOR,  3. Date of Earliest Transaction (Month/Day/Year) 05/29/2007 (Street) NEW YORK, NY 10022 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ 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 Stock, $.001 Par Value 05/29/2007   P   366,130 A $ 3.8776 15,006,197 D (1)   Common Stock, $.001 Par Value 05/30/2007   P   374,855 A $ 4.0306 15,381,052 D (1)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
STEEL PARTNERS II LP 590 MADISON AVENUE, 32ND FLOOR NEW YORK, NY 10022		X
STEEL PARTNERS LLC C/O STEEL PARTNERS II, L.P. 590 MADISON AVENUE, 32ND FLOOR NEW YORK, NY 10022		X
LICHTENSTEIN WARREN G C/O STEEL PARTNERS II, L.P. 590 MADISON AVENUE, 32ND FLOOR NEW YORK, NY 10022		X

Signatures

By: Steel Partners II, L.P., By: Steel Partners, L.L.C., General Partner, By: /s/ Lauren Isenman, as Attorney in Fact for Warren G. Lichtenstein, Managing Member		05/31/2007
**Signature of Reporting Person		Date
By: Steel Partners, L.L.C., By: /s/ Lauren Isenman, as Attorney in Fact for Warren G. Lichtenstein, Managing Member		05/31/2007
**Signature of Reporting Person		Date
By: /s/ Lauren Isenman, as Attorney in Fact for Warren G. Lichtenstein		05/31/2007
**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)	This Form 4 is filed jointly by Warren G. Lichtenstein, Steel Partners, L.L.C. ("Steel LLC") and Steel Partners II, L.P. ("Steel LP"). Mr. Lichtenstein and Steel LLC are deemed to be 10% owners of the Issuer and Steel LP is a 10% owner of the Issuer. The securities reported in this Form 4 are owned directly by Steel LP, and owned indirectly by Steel LLC by virtue of it being the general partner of Steel LP and by Mr. Lichtenstein by virtue of his position as the sole executive officer and managing member of Steel LLC. Steel LLC and Mr. Lichtenstein disclaim beneficial ownership of the shares owned by Steel LP except to the extent of their pecuniary interest therein.

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