Information processing system, storage apparatus and storage device
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United States of America Patent
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Oct 16, 2018
Grant Date -
Nov 9, 2017
app pub date -
Jun 1, 2015
filing date -
Jun 1, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A purpose is to speed up a write process with a parity update. An information processing system includes storage devices constituting a RAID group, coupled to one bus and communicating with each other. Each of the storage devices includes a device controller and a storage medium for storing data. The storage devices include a first storage device storing old data and a second storage device storing old parity associated with the old data. A first device controller of the first storage device creates intermediate parity based on the old data and new data for updating the old data and transmit the intermediate parity to the second storage device specifying the second storage device storing the old parity associated with the old data, and a second device controller of the second storage device creates new parity based on the intermediate parity and the old parity.
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