Title:
DISK ARRAY DEVICE
Document Type and Number:
Japanese Patent JP2006268523
Kind Code:
A
Abstract:
To provide a disk array device for reducing a bottleneck of a cache memory by eliminating useless access to the cache memory as much as possible.
A WT flag, an MOD flag, a PG flag and a TYPE flag are provided in management information for managing the cache memory 20, data on a cache page used for parity generation are data written from a host by fast writing, it is possible to recognize that parity update by the data is not completed, and in this case, the parity is updated by write data from the host in the same manner as that of a normal cache hit.
Inventors:
HAGIWARA HIROYUKI
Application Number:
JP2005086466A
Publication Date:
October 05, 2006
Filing Date:
March 24, 2005
Export Citation:
Assignee:
NEC CORP
International Classes:
G06F3/06; G06F12/08
Attorney, Agent or Firm:
Masahiko Desk
Masashi Kudo
Yasuhisa Tanizawa
Masashi Kudo
Yasuhisa Tanizawa
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