QUANTUM CORP /DE/ — Director's Dealing 2011

Feb 15, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: QUANTUM CORP /DE/ (QTM)
CIK: 0000709283
Period of Report: 2011-02-14

Reporting Person: HALL SHAWN D (Senior VP, GC & Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-14	Common Stock	M	50000	$0.98	Acquired	276407	Direct
2011-02-14	Common Stock	S	50000	$2.8570	Disposed	226407	Direct
2011-02-14	Common Stock	S	14637	$2.8625	Disposed	211770	Direct
2011-02-14	Common Stock	S	44741	$2.8578	Disposed	167029	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-14	Non-Qualified Stock Options	$0.98	M	50000	Disposed	2016-07-01	Common Stock (50000)	Direct

Footnotes

F1: Reflects the exercise of the stock options listed in Table II of this Form 4.

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2010.

F3: The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $2.84 to $2.88 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.