<SEC-DOCUMENT>0000897226-12-000006.txt : 20120214
<SEC-HEADER>0000897226-12-000006.hdr.sgml : 20120214
<ACCEPTANCE-DATETIME>20120214155812
ACCESSION NUMBER:		0000897226-12-000006
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20120214
DATE AS OF CHANGE:		20120214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			QUANTUM CORP /DE/
		CENTRAL INDEX KEY:			0000709283
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER STORAGE DEVICES [3572]
		IRS NUMBER:				942665054
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-35818
		FILM NUMBER:		12609345

	BUSINESS ADDRESS:	
		STREET 1:		1650 TECHNOLOGY DRIVE
		STREET 2:		SUITE 700
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110
		BUSINESS PHONE:		408 944 4000

	MAIL ADDRESS:	
		STREET 1:		1650 TECHNOLOGY DRIVE
		STREET 2:		SUITE 700
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PRIVATE CAPITAL MANAGEMENT
		CENTRAL INDEX KEY:			0000897226
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				593654603
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		8889 PELICAN BAY BLVD
		STREET 2:		STE 500
		CITY:			NAPLES
		STATE:			FL
		ZIP:			34108
		BUSINESS PHONE:		9412542525

	MAIL ADDRESS:	
		STREET 1:		8889 PELICAN BAY BLVD
		STREET 2:		STE 500
		CITY:			NAPLES
		STATE:			FL
		ZIP:			34108

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PRIVATE CAPITAL MANAGEMENT INC /FL
		DATE OF NAME CHANGE:	19950223
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>qtm.txt
<TEXT>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G	Amendment 13

(Name of Issuer)
	Quantum Corp.

(Title of Class of Securities)
Common Stock

(CUSIP Number)
	747906204

Rule 13d-1(b)


(Date of Event Which Requires Filing of This Statement)
December 31, 2011

NAME OF REPORTING PERSON
Private Capital Management, L.P. ("PCM")

I.R.S. IDENTIFICATION NO.
59-3654603

MEMBER OF A GROUP?
(b) X

PLACE OF ORGANIZATION
Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
SOLE VOTING POWER 	      1,478,540
SHARED VOTING POWER*	      17,927,388
SOLE DISPOSITIVE POWER 	      1,478,540
SHARED DISPOSITIVE POWER	      17,927,388

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON**
	      19,405,928

PERCENT OF CLASS REPRESENTED BY AGGREGATE AMOUNT BENEFICIALLY
OWNED
	8.3%

TYPE OF REPORTING PERSON
IA


ITEMS 1 - 10 OF GENERAL INSTRUCTIONS

Item 1.
(a)Name of Issuer: 	Quantum Corp.
(b)Address of Issuer: 	1650 TECHNOLOGY DRIVE, SUITE 700
 			SAN JOSE CA 95110

Item 2.
(a)Name of Person Filing:  PCM
(b)Address of Person Filing: 8889 Pelican Bay Blvd., Suite 500
   		             Naples, FL  34108
(c)Citizenship:  Delaware
(d)Title of Class of Securities:  Common Stock
(e)CUSIP Number:  	747906204

Item 3.
The reporting person is filing as an Investment Adviser registered
under section 203 of the Investment Advisers Act of 1940.

Item 4.  Ownership
(a) Amount Beneficially Owned**
	      19,405,928
(b) Percent of Class
	8.3%
(c) Number of shares as to which such person has:
   (i)   sole power to vote or to direct the vote
	     1,478,540
   (ii)  shared power to vote or to direct the vote*
	    17,927,388
   (iii) sole power to dispose or to direct the disposition of
	     1,478,540
   (iv)  shared power to dispose or to direct the disposition of
	    17,927,388

Item 5. Ownership of Five Percent or Less of Class:
NO

Item 6. Ownership of More than Five Percent on Behalf of Another
Person:
NO

Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on By the Parent Holding
Company:
NO

Item 8. Identification and Classification of Members of the Group:
NO

Item 9. Notice of Dissolution of Group:
NO

Item 10. Certification:
By signing below I certify that, to the best of my
knowledge and belief, the securities referred to above were
acquired in the ordinary course of business and were not acquired
for the purpose of and do not have the effect of changing or
influencing the control of the issuer of such securities and were
not acquired in connection with or as a participant in any
transaction having such purposes or effect.


* PCM exercises shared voting authority with respect to shares held
by those PCM clients that have delegated proxy voting authority to
PCM.  Such delegation may be granted or revoked at any time at the
client's discretion.

** PCM disclaims beneficial ownership of shares over which it has
dispositive power and disclaims the existence of a group.


Signature:

After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement
is true, complete and correct.

Date: February 14, 2012

/s/ Chad D. Atkins
    General Counsel

Duly authorized under Power of Attorney dated January 3, 2007 by
and on behalf of Private Capital Management, L.P.
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>