Storage system

Details Storage system Storage system

2007-04-10

2007-04-10

Bragdon, Reginald (Department: 2189)

Electrical computers and digital processing systems: memory

Address formation

Address mapping

C711S114000, C711S170000

Reexamination Certificate

active

10735155

ABSTRACT:
Disclosed is a storage system having storage devices from which storage areas are specified. Virtualization apparatuses allocate the storage areas as virtual volumes and processes I/O requests with respect to the virtual volumes. A controller is operable to change the allocation of storage areas to the virtual volumes. The controller is configured to send a request to some of the virtualization apparatuses to temporarily suspend processing of their I/O. When a virtualization apparatus receives such a request, it completes its pending I/O and temporarily suspends subsequent I/O requests, and sends a completion report to the controller. The controller then changes the allocation of storage areas to the virtual volumes.

REFERENCES:
patent: 5956750 (1999-09-01), Yamamoto et al.
patent: 6446161 (2002-09-01), Yamamoto et al.
patent: 6526492 (2003-02-01), McBrearty et al.
patent: 2002/0144076 (2002-10-01), Yamamoto et al.
patent: 2000-242434 (2000-09-01), None

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