Raid logical stripe backup to non-volatile memory in response to raid storage device media errors
When a media error occurs on a storage device of a number of storage devices of a redundant array, the logical stripe of data affected by the media error is determined. A portion of non-volatile memory is reserved and the logical stripe is backed up to this portion of non-volatile memory. A read req...
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| Zusammenfassung: | When a media error occurs on a storage device of a number of storage devices of a redundant array, the logical stripe of data affected by the media error is determined. A portion of non-volatile memory is reserved and the logical stripe is backed up to this portion of non-volatile memory. A read request is subsequently serviced from the non-volatile memory and not from the storage devices. When a write request is received, it is first serviced to the storage devices. If successful, then the previously reserved portion of non-volatile memory is freed up, and subsequent requests are serviced using the storage devices. If unsuccessful, then the write request is serviced using the non-volatile memory. |
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