STORAGE SYSTEM AND STORAGE APPARATUS

专利名称：STORAGE SYSTEM AND STORAGE

APPARATUS

发明人：Uehara, Go,Homma, Shigeo,Noborikawa,

Yoshiyuki

申请号：EP15167393.6申请日：20120427公开号：EP2942713A1公开日：20151111

专利附图：

摘要：A storage system comprises a first controller and a plurality of storage devices.The Plurality of storage devices configure RAID, each of which includes one or more non-

volatile memory chips providing storage space where data from a host computer isstored, and a second controller coupled to the non-volatile memory chips. In case wherethe first controller receives an update request to update first data to second data fromthe host computer, the second controller in a first storage device of the storage devicesis configured to store the second data in an area different from an area where the firstdata has been stored, in the storage space of the first storage device; generate

information that relates the first data and the second data; and generate an intermediateparity based on the first and the second data. The second controller in a second storagedevice of the storage devices that stores a first parity corresponding to the first data isconfigured to receive the intermediate parity, generate a second parity based on the firstparity and the intermediate parity, and store the second parity in an area in the storagespace of the second storage device. The second controller in the first storage device isconfigured to delete the information after the second parity is stored in the area in thestorage space of the second storage device, and set the area where the first data hasbeen stored as a erase target area.

申请人：Hitachi, Ltd.

地址：6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo 100-8280 JP

国籍：JP

代理机构：MERH-IP Matias Erny Reichl Hoffmann

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