Exhibit 21
 
QUANTUM CORPORATION
 
SUBSIDIARIES OF THE REGISTRANT
 
1       A.C.N. 120.786.012 Pty. Ltd., an Australian company
 
2 Advanced Digital Information Corporation, a Washington Corporation
 
3 Certance (US) Holdings, Inc., a Delaware corporation
 
4 Certance Holdings Corporation, a Delaware corporation
 
5 Certance LLC, a Delaware limited liability company
 
6 Quantum Beteiligungs GmbH, a German corporation
 
7 Quantum Boehmenkirch GmbH & Co. KG, a German corporation
 
8 Quantum Distribution UK Ltd., a United Kingdom corporation
 
9 Quantum GmbH, a German corporation
 
10 Quantum India Development Center Private Ltd., an Indian company
 
11 Quantum International Inc., a Delaware corporation
 
12 Quantum Korea Co. Ltd., a Korean corporation
 
13 Quantum Peripherals (Europe) SARL, a Swiss corporation
 
14 Quantum SARL, a French corporation
 
15 Quantum Storage Australia Pty. Ltd., an Australian corporation
 
16 Quantum Storage France, a French corporation
 
17 Quantum Storage GmbH, a Swiss corporation
 
18 Quantum Storage Japan Corporation, a Japanese corporation
 
19 Quantum Storage Singapore Pte. Ltd., a Singapore private company
 
20 Quantum Storage UK Ltd., a United Kingdom corporation
 
21 Rocksoft Pty. Ltd., an Australian company