Storage device and its control method

专利名称：Storage device and its control method发明人：Hirotaka Nakagawa,Masayasu Asano,Takeki

Okamoto,Nobuyuki Osaki

申请号：US13711725申请日：20121212公开号：US08935537B2公开日：20150113

专利附图：

摘要：A storage device partitions data from a host into multiple partitioned data anddistributes, encrypts and stores them together with a parity in multiple memorymediums. This storage device executes processing of restoring the partitioned data or

the parity stored in a memory medium subjectable to encryption re-key based ondecrypted data of the partitioned data or the parity stored in each memory mediumother than the memory medium subjectable to encryption re-key among the multiplememory mediums, storing the restored partitioned data or the parity in a backupmemory medium while encrypting the restored partitioned data or the parity with a newencryption key, and thereafter interchanging the backup memory medium and thememory medium subjectable to encryption re-key so that the backup memory mediumwill be a memory medium configuring the parity group and the memory mediumsubjectable to encryption re-key will be the backup memory medium.

申请人：Hitachi, Ltd.

地址：Tokyo JP

国籍：JP

代理机构：Brundidge & Stanger, P.C.

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