UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934
                                (Amendment No.)*



                              QUALSTAR CORPORATION
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                                (Name of Issuer)


                         COMMON STOCK WITHOUT PAR VALUE
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                         (Title of Class of Securities)


                                    74758R109
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                                 (CUSIP Number)


                                  April 3, 2009
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             (Date of Event Which Requires Filing of this Statement)



Check the appropriate box to designate the rule pursuant to  which this Schedule
13G is filed:

              [ ] Rule 13d-1(b)
              [X] Rule 13d-1(c)
              [ ] Rule 13d-1(d)




*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 the
disclosures provided in a prior cover page.


The information required in 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.  74758R109
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(1)   Names of Reporting Persons.  I.R.S. Identification Nos. of  Above  Persons
      (entities only):

                      Harvey Partners, LLC
                      20-3760303
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(2)   Check  the  Appropriate Box  if  a  Member of  a  Group (See Instructions)
         (a)  [ ]                           (b) [ ]
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(3)   SEC Use Only
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(4)   Citizenship or Place of Organization:  Delaware, United States
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Number of Shares Beneficially Owned by
   Each Reporting Person With          (5) Sole Voting Power:          756,000**
                                           -------------------------------------
                                       (6) Shared Voting Power:              0**
                                           -------------------------------------
                                       (7) Sole Dispositive Power:     756,000**
                                           -------------------------------------
                                       (8) Shared Dispositive Power:         0**
                                           -------------------------------------
--------------------------------------------------------------------------------

(9)   Aggregate Amount Beneficially Owned by Each Reporting Person:  756,000**

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(10)  Check if  the  Aggregate Amount  in  Row  (9) Excludes Certain Shares (See
      Instructions):
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(11)  Percent of Class Represented by Amount in Row (9):   6.2%**
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(12)  Type of Reporting Person (See Instructions):  IA
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** As of April 3, 2009, Harvey SMidCap Fund, LP, a Delaware limited  partnership
("SMidCap  Fund"),  held 657,720  shares of common stock  without par value (the
"Common  Shares")  of  Qualstar  Corporation,   a  California  corporation  (the
"Company").  As of April 3, 2009,  Harvey SMidCap  Offshore Fund, Ltd., a Cayman
Islands exempted company ("SMidCap  Offshore Fund"),  held 98,280 Common Shares.
Harvey Partners,  LLC, a Delaware limited liability company ("Harvey Partners"),
is the investment  manager of SMidCap Fund and SMidCap  Offshore  Fund,  and, as
such,  possesses sole power to vote and direct the disposition of all securities
of the Company held by SMidCap Fund and SMidCap Offshore Fund. James A. Schwartz
and Jeffrey C. Moskowitz,  the Managing Members of Harvey Partners, share voting
and investment power with respect to all securities beneficially owned by Harvey
Partners.

Based upon information set forth in the Company's most recent proxy statement on
Schedule 14A, as filed with the Securities  and Exchange  Commission on February
19, 2009,  there were  12,253,117  Common Shares  outstanding as of February 11,
2009.  As a result of the  foregoing,  for purposes of Reg.  Section  240.13d-3,
Harvey Partners is deemed to beneficially own 756,000 Common Shares,  or 6.2% of
the Common  Shares  deemed issued and  outstanding  as of April 3, 2009.  Harvey
Partners' interest in the securities reported herein is limited to the extent of
its pecuniary interest in SMidCap Fund and SMidCap Offshore Fund, if any.






Item 1(a)  Name Of Issuer:  Qualstar Corporation

Item 1(b)  Address of Issuer's Principal Executive Offices:
           3990-B Heritage Oak Court, Simi Valley, CA  93063


Item 2(a)  Name of Person Filing:  Harvey Partners, LLC

Item 2(b)  Address  of  Principal  Business  Office  or,  if  None,  Residence:
           350 Madison Avenue, 8th Floor, New York, NY 10017

Item 2(c)  Citizenship:  Harvey Partners, LLC is a Delaware Limited Liability
                         Company.

Item 2(d)  Title of Class of Securities: Common Stock without par value

Item 2(e)  CUSIP No.:  74758R109


Item 3.    If  This  Statement Is  Filed  Pursuant  to  Section  240.13d-1(b) or
           240.13d-2(b) or (c), check whether the Person Filing is a:

           Not applicable.


Item 4.    Ownership

         (a)   Amount Beneficially Owned:

                   756,000**

         (b)   Percent of Class:

                   6.2%**

         (c)   Number of Shares as to which such person has:

               (i) sole power to vote or to direct the vote            756,000**

              (ii) shared power to vote or to direct the vote                  0

             (iii) sole power to dispose or to direct the
                   disposition of                                      756,000**

              (iv) shared power to dispose or to direct the
                   disposition of                                              0



-------------
** As of April 3, 2009, Harvey SMidCap Fund, LP, a Delaware limited  partnership
("SMidCap  Fund"),  held 657,720  shares of common stock  without par value (the
"Common  Shares")  of  Qualstar  Corporation,   a  California  corporation  (the
"Company").  As of April 3, 2009,  Harvey SMidCap  Offshore Fund, Ltd., a Cayman
Islands exempted company ("SMidCap  Offshore Fund"),  held 98,280 Common Shares.
Harvey Partners,  LLC, a Delaware limited liability company ("Harvey Partners"),
is the investment  manager of SMidCap Fund and SMidCap  Offshore  Fund,  and, as
such,  possesses sole power to vote and direct the disposition of all securities
of the Company held by SMidCap Fund and SMidCap Offshore Fund. James A. Schwartz
and Jeffrey C. Moskowitz,  the Managing Members of Harvey Partners, share voting
and investment power with respect to all securities beneficially owned by Harvey
Partners.

Based upon information set forth in the Company's most recent proxy statement on
Schedule 14A, as filed with the Securities  and Exchange  Commission on February
19, 2009,  there were  12,253,117  Common Shares  outstanding as of February 11,
2009.  As a result of the  foregoing,  for purposes of Reg.  Section  240.13d-3,
Harvey Partners is deemed to beneficially own 756,000 Common Shares,  or 6.2% of
the Common  Shares  deemed issued and  outstanding  as of April 3, 2009.  Harvey
Partners' interest in the securities reported herein is limited to the extent of
its pecuniary interest in SMidCap Fund and SMidCap Offshore Fund, if any.







Item 5.   Ownership of Five Percent or Less of a Class

          If this  statement  is being  filed to report  the fact that as of the
date  hereof the  reporting  person has ceased to be the owner of more than five
percent of the class of securities, check the following: [ ]


Item 6.   Ownership of More Than Five Percent on Behalf of Another Person

          Not Applicable.


Item 7.   Identification and Classification of the Subsidiary Which Acquired the
          Security  Being Reported  on by the  Parent Holding Company or Control
          Person

          Not Applicable.


Item 8.   Identification and Classification of Members of the Group

          Not Applicable.


Item 9.   Notice of Dissolution of Group

          Not Applicable.


Item 10.  Certification

          By  signing  below I certify  that, to the  best of my  knowledge  and
belief, the securities  referred to above were not acquired and are not held for
the purpose of or with the effect of changing or  influencing the control of the
issuer of the  securities  and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.







                                    SIGNATURE


          After reasonable inquiry and to the best of my knowledge and belief, I
certify that  the information set forth  in this statement is true, complete and
correct.


                                              April 16, 2009

                                              HARVEY PARTNERS, LLC


                                              By:/s/ Jeffrey C. Moskowitz
                                                 -------------------------------
                                              Name:  Jeffrey C. Moskowitz
                                              Title: Managing Member



      Attention: Intentional misstatements or omissions of fact constitute
                Federal criminal violations (See 18 U.S.C. 1001)