SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

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QUANTUM CORPORATION
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(Name of Registrant as Specified In Its Charter)

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*** Exercise Your Right to Vote ***
IMPORTANT NOTICE Regarding the Availability of Proxy Materials
		Meeting Information
	QUANTUM CORPORATION	Meeting Type:		Annual
		For holders as of:		06/22/09
		Date: 08/19/09		Time: 8:00 A.M., PDT
		Location:	Corporate Headquarters 1650 Technology Drive San Jose, CA 95110
	QUANTUM CORPORATION 1650 TECHNOLOGY DRIVE SUITE 800 SAN JOSE, CA 95110	You are receiving this communication because you hold shares in the company named above. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting.
		See the reverse side of this notice to obtain proxy materials and voting instructions.

— Before You Vote —
How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE: NOTICE AND PROXY STATEMENT ANNUAL REPORT FORM 10-K COMBO How to View Online: Have the 12-Digit Control Number available (located on the following page) and visit: www.proxyvote.com. How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:
	1) BY INTERNET:	www.proxyvote.com
	2) BY TELEPHONE:	1-800-579-1639
	3) BY E-MAIL*:	sendmaterial@proxyvote.com
* If requesting materials by e-mail, please send a blank e-mail with the 12-Digit Control Number (located on the following page) in the subject line.
Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. To facilitate timely delivery, please make the request as instructed above on or before 08/05/09.

— How To Vote —
Please Choose One of the Following Voting Methods

Vote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the 12-Digit Control Number available and follow the instructions. Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

Voting Items
THE DIRECTORS RECOMMEND A VOTE "FOR" ITEMS 1, 2 AND 3.
1.	Proposal to elect 01) Paul R. Auvil III, 02) Richard E. Belluzzo, 03) Michael A. Brown, 04) Thomas S. Buchsbaum, 05) Edward M. Esber, Jr., 06) Elizabeth A. Fetter, 07) Joseph A. Marengi, 08) Bruce A. Pasternack and 09) Dennis P. Wolf to the Board of Directors.

2.	Proposal to ratify the appointment of PricewaterhouseCoopers LLP as the independent registered public accounting firm of the Company for the fiscal year ending March 31, 2010.
3.	Provided that the Company has not effected a reverse stock split before August 19, 2009, proposal to reauthorize the Company’s Board of Directors to select and file one of several possible amendments to the Company’s amended and restated certificate of incorporation which would effect a reverse stock split, pursuant to which any whole number of outstanding shares of the Company’s Common Stock between and including three and twelve would be combined into one share of such stock.
4.	Proposal to transact such other business as may properly come before the meeting or any adjournment or postponement thereof.