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Storage device and its control method
US8935537B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8935537-B2 |
| Application number | US-201213711725-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 12, 2012 |
| Priority date | May 25, 2009 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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- Title
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Abstract
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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.
First claim
Opening claim text (preview).
What is claimed is: 1. A storage device coupled to one or more external devices, the storage device comprising: a plurality of memory mediums including a backup memory medium; and a control unit, wherein the control unit encrypts data supplied from any of the one or more external devices by using a first encryption key and stores the encrypted data in a memory medium of the plurality of memory mediums, the control unit comprising: a determination unit configured to make a de…
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Classifications
- G06F11/2094Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8935537B2 cover?
- 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 memo…
- Who is the assignee on this patent?
- Hitachi Ltd
- What technology area does this patent fall under?
- Primary CPC classification G06F11/2094. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).