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US 6,611,851 B2Granted
Storage sub-system having expanded data read
AssigneeHitachi, Ltd.
InventorsAtsushi Ishikawa, Yoshiko Matsumoto, Kenichi Takamoto
Life of this patent
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Abstract
A storage sub-system employs a staging control information table by which staging of data to be read and redundant data thereof can be executed together to reduce response time in the event of a data read failure. The staging control information table also permits pre-read staging to be executed in the forward, backward or both the forward and backward directions, to reduce response time.
Claims1
A storage system, comprising:
- a recording medium;
- data transferring means which controls transfer of data to and from said recording medium;
- a cache memory for storing data transferred to and from said recording medium;
- staging means which stages data to the cache from said recording medium;
- and
- a staging information table which includes information which indicates the direction of pre-reading and the data volume of pre-reading;
- wherein said staging means stages data by referring to said staging information table when current data is read from the recording medium.
4 more elements
Dependencies are inferred from the claim text.