Storage device and write access processing method for...

Details Storage device and write access processing method for... Storage device and write access processing method for...

2008-05-20

2008-05-20

Shah, Sanjiv (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S113000, C711S114000

Reexamination Certificate

active

07376785

ABSTRACT:
The present invention allows the processing mode for write access operations to be set independently and respectively for prescribed units. The processing modes for handling write access are set previously for each of the volumes6A and6B. If the cache memory is functioning normally, write access operations to the respective volumes6A and6B are processed by means of an after-write method as illustrated in FIG.1(a). If an abnormality has occurred in the cache memory, then write access operations to the volumes6A and6B are processed by means of a method previously selected from a write-through method as illustrated in FIG.1(b) or a non-redundant storage type write-after method as illustrated in FIG.1(c). By using different processing modes for write access, for each of the volumes6A and6B, it is possible to set a suitable processing mode respectively for each of the prescribed units, in accordance with the composition of the storage system, the operation configuration, and the like.

REFERENCES:
patent: 5761705 (1998-06-01), DeKoning et al.
patent: 2003/0212921 (2003-11-01), Howe
patent: 6-309232 (1994-11-01), None

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