Quarterly report pursuant to Section 13 or 15(d)

DOCUMENT AND ENTITY INFORMATION

v2.4.0.6
DOCUMENT AND ENTITY INFORMATION
9 Months Ended
Dec. 31, 2012
Feb. 01, 2013
Entity Registrant Name QUANTUM CORP /DE/  
Entity Central Index Key 0000709283  
Current Fiscal Year End Date --03-31  
Entity Filer Category Accelerated Filer  
Trading Symbol qtm  
Entity Common Stock, Shares Outstanding   240,962,472
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 31, 2012  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2013