Write back method for RAID apparatus

Details Write back method for RAID apparatus Write back method for RAID apparatus

2006-02-17

2008-05-06

Nguyen, Hiep T. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S114000, C711S143000

Reexamination Certificate

active

07370145

ABSTRACT:
A RAID control apparatus comprises at least a cache memory; an update information management table for storing update information; an update information storage unit for storing, in the update information management table, update information by detecting a data update; a reference value generation unit for generating a reference value expressing a load of a write back processing by using a Small Write method and a Read & Bandwidth Write method based on the update information; a write method determination unit for determining a write method according to the reference value and a write unit for carrying out a write processing, in order to provide a write back method for a RAID apparatus capable of improving a processing speed at the time of updating even in the case of including the processing of updating a part of data stripes.

REFERENCES:
patent: 2003/0182502 (2003-09-01), Kleiman et al.
patent: 2004/0093463 (2004-05-01), Shang
patent: 2006/0206752 (2006-09-01), Ikeuchi et al.

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