POWER OF ATTORNEY

Know all by these presents, that the
undersigned hereby constitutes and appoints
each of Shawn Hall, Mary Springer and
Zoey Armstrong, signing singly, the undersigned's true
and lawful attorney-in-fact to:

(1)  execute for and on behalf of the
undersigned, in the undersigned's capacity as
an officer and/or director of Quantum
Corporation (the "Company"), Forms 3, 4, and 5
in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules
thereunder;

(2)  do and perform any and all acts for and on
behalf of the undersigned which may be
necessary or desirable to complete and execute
any such Form 3, 4, or 5, complete and execute
any amendment or amendments thereto, and timely
file such form with the United States
Securities and Exchange Commission and any
stock exchange or similar authority; and

(3)  take any other action in connection with
the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the
best interest of, or legally required by, the
undersigned, it being understood that the
documents executed by such attorney-in-fact on
behalf of the undersigned pursuant to this
Power of Attorney shall be in such form and
shall contain such terms and conditions as such
attorney-in-fact may approve in such attorney-
in-fact's discretion.

The undersigned hereby grants to each such
attorney-in-fact full power and authority to do
and perform any and every act and thing
whatsoever requisite, necessary, or proper to
be done in the exercise of any of the rights
and powers herein granted, as fully to all
intents and purposes as the undersigned might
or could do if personally present, with full
power of substitution or revocation, hereby
ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's
substitute or substitutes, shall lawfully do or
cause to be done by virtue of this power of
attorney and the rights and powers herein
granted.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such
capacity at the request of the undersigned, are
not assuming, nor is the Company assuming, any
of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act
of 1934.

This Power of Attorney shall remain in full
force and effect until the undersigned is no
longer required to file Forms 3, 4, and 5 with
respect to the undersigned's holdings of and
transactions in securities issued by the
Company, unless earlier revoked by the
undersigned in a signed writing delivered to
the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of
this 28th day of August 2006.


By: /s/ William C. Britts
Name: William C. Britts