Disk controller and method of controlling the cache

Details Disk controller and method of controlling the cache Disk controller and method of controlling the cache

2006-10-31

2006-10-31

Chace, Christian P. (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S124000, C711S129000, C711S130000, C711S141000

Reexamination Certificate

active

07130961

ABSTRACT:
To execute cache data identity control between disk controllers in plural disk controllers provided with each cache. To prevent a trouble from being propagated to another disk controller even if the trouble occurs in a specific disk controller. The identity control of data is executed via a communication means between disk controllers. In case update access from a host is received, data in a cache memory of a disk controller that controls at least a data storage drive is updated. It is desirable that a cache area is divided into an area for a drive controlled by the disk controller and an area for a drive controlled by another disk controller and is used.

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I. Matsuoka, “Storage Area Network Now Having Been Widely Applied”, SunWorld, Japan, Kabushiki Gaisha IDG Communications, May 1, 1999, vol. No. 5, pp. 36.

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