Checksumming RAID

Brain Kroth, Suli Yang

Abstract: Storage systems exhibit silent data corruptions that go unnoticed until too late, potenially resulting in whole trees of lost data. To deal with this, we've integrated a checksumming mechanism into Linux's Multi-Device Software RAID layer so that we are able to detect and correct these silent data corruptions. The analysis of our naive implementation shows that this can be done with a reasonable performance overhead.

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