发明名称 |
STORAGE DEVICE AND ITS CONTROL METHOD |
摘要 |
<p>A storage device partitions data from a host into multiple partitioned data and distributes, encrypts and stores them together with a parity in multiple memory mediums. This storage device executes processing of restoring the partitioned data or the parity stored in a memory medium subjectable to encryption re-key based on decrypted data of the partitioned data or the parity stored in each memory medium other than the memory medium subjectable to encryption re-key among the multiple memory mediums, storing the restored partitioned data or the parity in a backup memory medium while encrypting the restored partitioned data or the parity with a new encryption key, and thereafter interchanging the backup memory medium and the memory medium subjectable to encryption re-key so that the backup memory medium will be a memory medium configuring the parity group and the memory medium subjectable to encryption re-key will be the backup memory medium.</p> |
申请公布号 |
EP2304919(A1) |
申请公布日期 |
2011.04.06 |
申请号 |
EP20090787965 |
申请日期 |
2009.05.25 |
申请人 |
HITACHI, LTD. |
发明人 |
NAKAGAWA, HIROTAKA;ASANO, MASAYASU;OKAMOTO, TAKEKI;OSAKI, NOBUYUKI |
分类号 |
H04L29/06;G06F21/00 |
主分类号 |
H04L29/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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