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 *
  Hayes Edward J Jr
 2. Date of Event Requiring Statement (Month/Day/Year)
07/01/2004		 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)
Executive VP & CFO
 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)
Common Stock (1) 100,000
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
Non Qualified Stock Option (Right to Buy) (2) 07/01/2004(3) 07/01/2011 Common Stock 400,000 $ 2.97 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Hayes Edward J Jr
1650 TECHNOLOGY DRIVE
SUITE 800
SAN JOSE, CA 95110		       Executive VP & CFO  

Signatures

/s/ Rita Larsen, by Rita Larsen, Attorney in Fact for Edward J. Hayes, Jr. 07/01/2004
**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) All direct ownership shares result from grant of restricted stock under Rule 16b(3) plan. The vesting of restricted stock will be: 50% on 7/1/2004; 25% on 7/1/2005; 25% on 7/1/2006. Purchase price of restricted stock is $0.01 per share.
(2) Right to buy granted under Rule 16b(3) plan.
(3) The non qualified stock options shall vest over four years as follows: 25% will vest on 7/1/2005 and the remainder will vest monthly thereafter at a rate of 1/48th of the original grant amount over the following three years.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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