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 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 *
  BARRETT BARBARA
2. Date of Event Requiring Statement (Month/Day/Year)
02/09/2004
3. Issuer Name and Ticker or Trading Symbol
QUANTUM CORP /DE/ [DSS]
(Last)
(First)
(Middle)
1650 TECHNOLOGY DRIVE, SUITE 800
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP Human Resources
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAN JOSE, CA 95110
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)
DSS Common Stock (1) 664
D
 

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
Option #D13980 04/01/1999(2) 04/27/2009 DSS Common Stock (3) 600 $ 17.2361 D  
Option #H13980 04/01/1999(2) 04/27/2009 DSS Common Stock (3) 274 $ 6.896 D  
Option #D16643 01/01/2000(4) 01/11/2010 DSS Common Stock (3) 667 $ 8.6875 D  
Option #D19519 01/01/2000(5) 01/11/2010 DSS Common Stock (3) 100 $ 8.6875 D  
Option #H16721 01/01/2000(4) 01/11/2010 DSS Common Stock (3) 304 $ 8.7879 D  
Option #H19519 01/01/2000(5) 01/11/2010 DSS Common Stock (3) 46 $ 8.7879 D  
Option #D25059 04/01/2000(6) 06/21/2010 DSS Common Stock (3) 2,800 $ 9.5625 D  
Option #H25059 04/01/2000(6) 06/21/2010 DSS Common Stock (3) 1,275 $ 12.4953 D  
Option #D30772 07/01/2001(6) 07/31/2011 DSS Common Stock (3) 7,500 $ 9.7 D  
Option #D33414 04/01/2002(6) 05/02/2012 DSS Common Stock (3) 5,000 $ 6.7 D  
Option #D32425 04/01/2002(6) 05/02/2012 DSS Common Stock (3) 10,000 $ 6.7 D  
Option #D33472 07/01/2002(6) 07/31/2012 DSS Common Stock (3) 10,000 $ 2.08 D  
Option #D33462 08/01/2002(6) 08/27/2012 DSS Common Stock (3) 20,000 $ 2.98 D  
Option #D34722 07/01/2003(4) 07/29/2008 DSS Common Stock (3) 40,000 $ 2.95 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
BARRETT BARBARA
1650 TECHNOLOGY DRIVE, SUITE 800
SAN JOSE, CA 95110
      VP Human Resources  

Signatures

Barbara Barrett 02/17/2004
**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) Purchase made pursuant to a qualified 16(b) plan.
(2) Vests 25% on first anniversary and monthly thereafter at a rate of 1/48th per month for remaining three years.
(3) Right to buy granted under Rule 16b(3) plan.
(4) Equal monthly vesting over 24 months.
(5) Vests 50% on 1-1-01 and 50% on 1-1-02.
(6) Equal monthly vesting over 48 months.

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