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 or Section 30(h) of the Investment Company Act of 1940

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3235-0104

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

RITTI PHILIP

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 Media

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	11,815	D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

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)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Option #H8391	02/01/1997⁽¹⁾	02/18/2007	DSS Common Stock ⁽²⁾	4,552	$ 6.8325	D
Option #H11286	04/01/1998⁽³⁾	05/01/2008	DSS Common Stock ⁽²⁾	1,625	$ 7.9325	D
Option #H11966	04/01/1998⁽³⁾	05/01/2008	DSS Common Stock ⁽²⁾	151	$ 7.9325	D
Option #H13348	04/01/1999⁽³⁾	02/19/2009	DSS Common Stock ⁽²⁾	710	$ 6.8537	D
Option #H15321	04/01/1999⁽³⁾	06/04/2009	DSS Common Stock ⁽²⁾	2,478	$ 6.4306	D
Option #H15968	04/01/1999⁽³⁾	06/04/2009	DSS Common Stock ⁽²⁾	227	$ 6.4306	D
Option #D17941	01/01/2000⁽⁴⁾	01/11/2002	DSS Common Stock ⁽²⁾	4,000	$ 8.6875	D
Option #H23292	01/01/2000⁽⁵⁾	01/11/2010	DSS Common Stock ⁽²⁾	46	$ 8.7879	D
Option #H17958	01/01/2000⁽⁴⁾	01/11/2010	DSS Common Stock ⁽²⁾	1,821	$ 8.7879	D
Option #D23292	01/01/2000⁽⁵⁾	01/11/2010	DSS Common Stock ⁽²⁾	100	$ 8.6875	D
Option #D26439	04/01/2000⁽³⁾	06/21/2010	DSS Common Stock ⁽²⁾	4,111	$ 9.5625	D
Option #HN26439	04/01/2000⁽³⁾	06/21/2010	DSS Common Stock ⁽²⁾	374	$ 12.4953	D
Option #DN26439	04/01/2000⁽³⁾	06/21/2010	DSS Common Stock ⁽²⁾	822	$ 9.5625	D
Option #H26439	04/01/2000⁽³⁾	06/21/2010	DSS Common Stock ⁽²⁾	1,872	$ 12.4953	D
Option #D30133	08/01/2000⁽³⁾	09/01/2010	DSS Common Stock ⁽²⁾	26,667	$ 13.5625	D
Option #H30133	08/01/2000⁽³⁾	09/01/2010	DSS Common Stock ⁽²⁾	12,138	$ 10.6416	D
Option #D32200	07/01/2001⁽¹⁾	01/07/2012	DSS Common Stock ⁽²⁾	10,000	$ 10.93	D
Option #D32201	07/01/2001⁽³⁾	01/07/2012	DSS Common Stock ⁽²⁾	3,569	$ 10.93	D
Option #D32202	07/01/2001⁽³⁾	01/07/2012	DSS Common Stock ⁽²⁾	331	$ 10.93	D
Option #D32203	07/01/2001⁽³⁾	01/07/2012	DSS Common Stock ⁽²⁾	1,560	$ 10.93	D
Option #D32204	07/01/2001⁽³⁾	01/07/2012	DSS Common Stock ⁽²⁾	5,443	$ 10.93	D
Option #D32205	07/01/2001⁽³⁾	01/07/2012	DSS Common Stock ⁽²⁾	497	$ 10.93	D
Option #D32330	07/01/2001⁽³⁾	01/07/2012	DSS Common Stock ⁽²⁾	28,393	$ 10.93	D
Option #DN32330	07/01/2001⁽³⁾	01/07/2012	DSS Common Stock ⁽²⁾	17,607	$ 10.93	D
Option #D33359	04/01/2002⁽³⁾	05/02/2012	DSS Common Stock ⁽²⁾	42,500	$ 6.7	D
Option #D33396	04/01/2002⁽³⁾	05/02/2012	DSS Common Stock ⁽²⁾	21,250	$ 6.7	D
Option #D33631	07/01/2002⁽³⁾	07/31/2012	DSS Common Stock ⁽²⁾	42,500	$ 2.08	D
Option #D35211	07/01/2003⁽⁴⁾	07/29/2008	DSS Common Stock ⁽²⁾	90,000	$ 2.95	D

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
RITTI PHILIP 1650 TECHNOLOGY DRIVE, SUITE 800 SAN JOSE, CA 95110			VP Media

Signatures

Philip Ritti		02/18/2004
^**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)	Vests 25% on first anniversary and monthly thereafter at a rate of 1/48th per month for remaining three years.
(2)	Right to buy granted under Rule 16b(3) plan.
(3)	Equal monthly vesting over 48 months.
(4)	Equal monthly vesting over 24 months.
(5)	50% vests on 1-1-01; 50% vests on 1-1-02.

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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