Ownership Submission
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 *
  STEEL PARTNERS II LP
 2. Date of Event Requiring Statement (Month/Day/Year)
08/07/2009		 3. Issuer Name and Ticker or Trading Symbol
ADAPTEC INC [ADPT]
(Last)
(First)
(Middle)
590 MADISON AVENUE, 32ND FLOOR, 		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

NEW YORK, NY 10022		 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 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, $.001 Par Value 12,089,719
D (1) (2)
 

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

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    
STEEL PARTNERS HOLDINGS L.P.
C/O STEEL PARTNERS II, L.P.
590 MADISON AVENUE, 32ND FLOOR
NEW YORK, NY 10022		     X    
STEEL PARTNERS II GP LLC
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 II GP LLC, General Partner, By: /s/ Sanford Antignas, as Attorney in Fact for Warren G. Lichtenstein, Managing Member 08/12/2009
**Signature of Reporting Person Date
By: Steel Partners LLC, By: /s/ Sanford Antignas, as Attorney In Fact for Warren G. Lichtenstein, Manager 08/12/2009
**Signature of Reporting Person Date
By: By: /s/ Sanford Antignas, as Attorney in Fact for Warren G. Lichtenstein 08/12/2009
**Signature of Reporting Person Date
By: Steel Partners Holdings L.P., By: Steel Partners II GP LLC, General Partner, By: /s/ Sanford Antignas, as Attorney In Fact for Warren G. Lichtenstein, Managing Member 08/12/2009
**Signature of Reporting Person Date
By: Steel Partners II GP LLC, By: /s/ Sanford Antignas, as Attorney In Fact for Warren G. Lichtenstein, Managing Member 08/12/2009
**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) This Form 3 is filed jointly by Steel Partners II, L.P. ("Steel Partners II"), Steel Partners Holdings L.P. ("Steel Holdings"), Steel Partners LLC ("Partners LLC"), Steel Partners II GP LLC ("Steel Partners GP") and Warren G. Lichtenstein. Steel Holdings, Partners LLC, Steel Partners GP and Mr. Lichtenstein may be deemed to be 10% owners of the Issuer and Steel Partners II is a 10% owner of the Issuer.
(2) The securities reported in this Form 3 are owned directly by Steel Partners II, and owned indirectly by Steel Holdings by virtue of it being the sole limited partner of Steel Partners II, by Partners LLC by virtue of it being the manager of Steel Partners II and Steel Holdings, by Steel Partners GP by virtue of it being the general partner of Steel Partners II and Steel Holdings and by Mr. Lichtenstein by virtue of his position as the manager of Partners LLC and the managing member of Steel Partners GP. Steel Holdings, Partners LLC, Steel Partners GP and Mr. Lichtenstein disclaim beneficial ownership of the shares owned by Steel Partners II except to the extent of their pecuniary interest therein.

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