sc13da601874121_12282007.htm

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

§ 240.13d-2(a)

(Amendment No. 6)1

Adaptec, Inc.

(Name of Issuer)

Common Stock, par value $0.001

(Title of Class of Securities)

00651F108

(CUSIP Number)

STEVE WOLOSKY, ESQ.

OLSHAN GRUNDMAN FROME ROSENZWEIG & WOLOSKY LLP

Park Avenue Tower

65 East 55th Street

New York, New York 10022

(212) 451-2300

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

December 28, 2007

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box o.

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See § 240.13d-7 for other parties to whom copies are to be sent.

_______________

1 The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP NO. 00651F108

1	NAME OF REPORTING PERSON STEEL PARTNERS II, L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 18,159,884
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 18,159,884
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 18,159,884
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		¨
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.9%
14	TYPE OF REPORTING PERSON PN

CUSIP NO. 00651F108

1	NAME OF REPORTING PERSON STEEL PARTNERS II GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 18,159,884
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 18,159,884
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 18,159,884
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		¨
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.9%
14	TYPE OF REPORTING PERSON OO

CUSIP NO. 00651F108

1	NAME OF REPORTING PERSON STEEL PARTNERS II MASTER FUND L.P.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 18,159,884
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 18,159,884
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 18,159,884
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		¨
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.9%
14	TYPE OF REPORTING PERSON PN

CUSIP NO. 00651F108

1	NAME OF REPORTING PERSON STEEL PARTNERS LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 18,159,884
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 18,159,884
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 18,159,884
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		¨
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.9%
14	TYPE OF REPORTING PERSON OO

CUSIP NO. 00651F108

1	NAME OF REPORTING PERSON WARREN G. LICHTENSTEIN
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 18,159,884
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 18,159,884
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 18,159,884
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		¨
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.9%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 00651F108

1	NAME OF REPORTING PERSON JACK L. HOWARD
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER - 0 -*
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER - 0 -*
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON - 0 -*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		¨
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%*
14	TYPE OF REPORTING PERSON IN

* See Item 5.

CUSIP NO. 00651F108

1	NAME OF REPORTING PERSON JOHN J. QUICKE
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER - 0 -*
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER - 0 -*
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON - 0 -*
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		¨
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%*
14	TYPE OF REPORTING PERSON IN

* See Item 5.

CUSIP NO. 00651F108

The following constitutes Amendment No. 6 to the Schedule 13D filed by the undersigned (“Amendment No. 6”). This Amendment No. 6 shall be deemed to amend and restate in their entirety Items 2, 3 and 5, add to Item 6 the existence of a new joint filing agreement among the Reporting Persons and add additional exhibits to Item 7 of the Schedule 13D. The primary purpose of amending the Schedule 13D is to reflect the change in name of Steel Partners, L.L.C. to Steel Partners II GP LLC and to add Steel Partners II Master Fund L.P. and Steel Partners LLC as Reporting Persons as a result of a reorganization of the Reporting Persons and their affiliates that was completed on December 28, 2007.

Item 2.

Identity and Background.

(a) This statement is filed by Steel Partners II, L.P., a Delaware limited partnership (“Steel Partners II”), Steel Partners II GP LLC, a Delaware limited liability company (“Steel GP LLC”), Steel Partners II Master Fund L.P., a Cayman Islands exempted limited partnership (“Steel Master”), Steel Partners LLC, a Delaware limited liability company (“Partners LLC”), Warren G. Lichtenstein, Jack L. Howard and John J. Quicke. Each of the foregoing is referred to as a “Reporting Person” and collectively as the “Reporting Persons.”

Steel Master is the sole limited partner of Steel Partners II. Steel GP LLC is the general partner of Steel Partners II and Steel Master. Partners LLC is the investment manager of Steel Partners II and Steel Master. Warren G. Lichtenstein is the manager of Partners LLC and the managing member of Steel GP LLC. Jack L. Howard is President of Partners LLC, Vice Chairman of Steel Partners, Ltd. (“SPL”), a management and advisory company that provides management services to Steel Partners II and its affiliates, and a principal of Mutual Securities, Inc. (“Mutual Securities”), a registered broker dealer. John J. Quicke is a managing director of Partners LLC and an operating partner of SPL. Messrs. Howard and Quicke are also directors of the Issuer. By virtue of these relationships, each of Steel GP LLC, Steel Master, Partners LLC and Mr. Lichtenstein may be deemed to beneficially own the Shares owned by Steel Partners II. Accordingly, the Reporting Persons are hereby filing a joint Schedule 13D.

(b) The principal business address of each of Steel Partners II, Steel GP LLC, Partners LLC, Warren G. Lichtenstein, Jack L. Howard and John J. Quicke is 590 Madison Avenue, 32nd Floor, New York, New York 10022. The principal business address of Steel Master is c/o Morgan Stanley Fund Services (Cayman) Ltd., Cricket Square, 2nd Floor, Boundary Hall, Hutchins Drive, P.O. Box 2681, Grand Cayman KY1-1111, Cayman Islands.

(c) The principal business of Steel Partners II, Steel Master and Warren G. Lichtenstein is investing in securities. The principal business of Steel GP LLC is serving as the general partner of Steel Partners II and Steel Master. The principal business of Partners LLC is serving as the investment manager of Steel Partners II and Steel Master. The principal occupation of Jack L. Howard is serving as President of Partners LLC, serving as Vice Chairman of SPL and serving as a principal of Mutual Securities. The principal occupation of John J. Quicke is serving as a managing director of Partners LLC and serving as an operating partner of SPL.

(d) No Reporting Person has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) No Reporting Person has, during the last five years, been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

CUSIP NO. 00651F108

(f) Warren G. Lichtenstein, Jack L. Howard and John J. Quicke are citizens of the United States of America.

Item 3.

Source and Amount of Funds or Other Consideration.

The aggregate purchase price of the 18,159,884 Shares owned by Steel Partners II is approximately $67,620,894, including brokerage commissions. The Shares owned by Steel Partners II were acquired with partnership funds.

Steel Partners II effects purchases of securities primarily through margin accounts maintained for it with prime brokers, which may extend margin credit to it as and when required to open or carry positions in the margin accounts, subject to applicable federal margin regulations, stock exchange rules and the prime brokers’ credit policies. In such instances, the positions held in the margin accounts are pledged as collateral security for the repayment of debit balances in the accounts.

Item 5.

Interest in Securities of the Issuer.

(a) The aggregate percentage of Shares reported owned by each person named herein is based upon 121,072,883 Shares outstanding, which is the total number of Shares outstanding as reported in the Issuer’s quarterly report on Form 10-Q for the quarter ended September 30, 2007 filed with the Securities and Exchange Commission on November 6, 2007.

As of the close of business on December 28, 2007, Steel Partners II beneficially owned 18,159,884 Shares, constituting approximately 14.9% of the Shares outstanding. By virtue of their relationships with Steel Partners II discussed in further detail in Item 2, each of Steel GP LLC, Steel Master, Partners LLC and Warren G. Lichtenstein may be deemed to beneficially own the Shares owned by Steel Partners II.

Currently, Jack L. Howard and John J. Quicke do not directly own any securities of the Issuer. Each of Jack L. Howard and John J. Quicke, as members of a “group” with the other Reporting Persons for purposes of Rule 13d-5(b)(1) of the Securities Exchange Act of 1934, as amended, may be deemed to beneficially own the Shares owned by Steel Partners II.

(b) Each of the Reporting Persons may be deemed to have the sole power to vote and dispose of the Shares reported in this Schedule 13D.

(c) There have been no transactions by the Reporting Persons in the securities of the Issuer since the filing of Amendment No. 5 to the Schedule 13D.

(d) No person other than the Reporting Persons is known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the Shares.

(e) Not applicable.

The filing of this Schedule 13D shall not be construed as an admission that the Reporting Persons are, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the beneficial owners of any securities covered by this Schedule 13D.

CUSIP NO. 00651F108

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

Pursuant to Rule 13d-1(k) promulgated under the Exchange Act, the Reporting Persons have entered into an agreement with respect to the joint filing of this statement, and any amendment or amendments thereto.

Item 7.

Material to be Filed as Exhibits.

99.1

Joint Filing Agreement by and among Steel Partners II, L.P., Steel Partners II GP LLC, Steel Partners II Master Fund L.P., Steel Partners LLC, Warren G. Lichtenstein, Jack L. Howard and John J. Quicke, dated December 31, 2007.

99.2

2008 Powers of Attorney.

CUSIP NO. 00651F108

SIGNATURES

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: December 31, 2007	STEEL PARTNERS II, L.P.

	By:	Steel Partners II GP LLC General Partner

	By:	/s/ Lauren Isenman
		Lauren Isenman as Attorney-In-Fact for Warren G. Lichtenstein, Managing Member

	STEEL PARTNERS II GP LLC

	By:	/s/ Lauren Isenman
		Lauren Isenman as Attorney-In-Fact for Warren G. Lichtenstein, Managing Member

	STEEL PARTNERS II MASTER FUND L.P.

	By:	Steel Partners II GP LLC General Partner

	By:	/s/ Lauren Isenman
		Lauren Isenman as Attorney-In-Fact for Warren G. Lichtenstein, Managing Member

	STEEL PARTNERS LLC

	By:	/s/ Lauren Isenman
		Lauren Isenman as Attorney-In-Fact for Warren G. Lichtenstein, Manager


	/s/ Lauren Isenman
	LAUREN ISENMAN as Attorney-In-Fact for Warren G. Lichtenstein


	/s/ Jack L. Howard
	JACK L. HOWARD


	/s/ John J. Quicke
	JOHN J. QUICKE