Exhibit 21

QUANTUM CORPORATION

SUBSIDIARIES OF THE REGISTRANT

 

1. ATL Products Ltd., a United Kingdom corporation

 

2. Quantum International Inc., a Delaware corporation

 

3. Quantum Peripheral Products (Ireland) Ltd., an Ireland corporation

 

4. Quantum Peripherals (Europe) Sárl., a Swiss corporation

 

5. Quantum Peripherals (Malaysia) Sdn. Bhd., a Malaysian corporation

 

6. Quantum Distribution (UK) Limited, a United Kingdom corporation

 

7. Quantum Storage Australia Pty. Ltd., an Australian corporation

 

8. Quantum Storage Germany GmbH, a German corporation

 

9. Quantum Storage France, a French corporation

 

10. Quantum Storage Japan Corporation, a Japanese corporation

 

11. Quantum Storage Singapore Pte. Ltd., a Singapore private company

 

12. Quantum Storage Solutions (M) Sdn. Bhd., a Malaysian corporation

 

13. Quantum Storage UK Ltd., a United Kingdom corporation

 

14. Certance Holding Corporation, a Delaware corporation

 

15. Certance LLC, a Delaware limited liability company

 

16. Certance (US) Holdings, Inc., a Delaware corporation

 

17. Certance International, a Cayman Islands company

 

18. M4 Data (Holdings) Ltd., a UK corporation

 

19. Advanced Digital Information Corporation, a Washington Corporation

 

20. ADIC AG, a Swiss corporation

 

21. Quantum GmbH, a Germany corporation

 

22. ADIC Germany GmbH & Co. KG, a Germany corporation

 

23. ADIC Germany Beteiligungs GmbH, a Germany corporation

 

24. ADIC International Holdings, a Cayman Islands company

 

25. ADIC Korea Co. Ltd., a Korean corporation

 

26. ADIC Limited, a UK corporation

 

27. Quantum SARL, a French corporation

 

28. ADIC Manufacturing, LLC, a Delaware company

 

29. Mountaingate Imaging Systems Corporation, a Delaware corporation

 

30. Pathlight Technology, Inc., a Delaware corporation

 

31. ADIC (US) Holdings, a Delaware corporation

 

32. A.C.N. 120.786.012 Pty. Ltd., an Australian company

 

33. Rocksoft Pty. Ltd., an Australian company

 

34. Rocksoft, Inc., a Texas corporation