Title:
STORAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/145724
Kind Code:
A1
Abstract:
This storage system is provided with a controller and a plurality of storage devices that constitute a RAID group. In the storage system, when write data is stored to a plurality of discontinuous regions in the stripe of a storage device, the write data and a new data transmission command that includes information specifying the plurality of discontinuous regions are transmitted to the storage device, an intermediate parity generated from the plurality of write data from the storage device and the pre-update data of the plurality of write data is then received, and the intermediate parity and an intermediate-parity transmission command are transmitted to a parity-storing storage device. When a data verification command that includes information specifying the plurality of discontinuous regions is then transmitted to the plurality of storage devices, the parity-storing storage device generates a post-update parity from the received intermediate parity and a pre-update parity that corresponds to the intermediate parity, and stores the post-update parity in a storage medium.
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Inventors:
YOSHIHARA TOMOHIRO (JP)
YAMAMOTO AKIRA (JP)
HOMMA SHIGEO (JP)
OGAWA JUNJI (JP)
YAMAMOTO AKIRA (JP)
HOMMA SHIGEO (JP)
OGAWA JUNJI (JP)
Application Number:
PCT/JP2014/059128
Publication Date:
October 01, 2015
Filing Date:
March 28, 2014
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G06F3/06
Foreign References:
| US20130290773A1 | 2013-10-31 | |||
| JP2014041471A | 2014-03-06 | |||
| JP2003167689A | 2003-06-13 | |||
| JPH10111762A | 1998-04-28 | |||
| JPH09282238A | 1997-10-31 |
Attorney, Agent or Firm:
Patent Corporate Body Dai-ichi Kokusai Tokkyo Jimusho (JP)
The first international patent firm of a patent business corporation (JP)
The first international patent firm of a patent business corporation (JP)
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