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BitRot detection is a technique used to identify an “insidious” type of disk error where data is silently corrupted with no indication from the disk to the storage software layer that an error has occurred. BitRot detection is exceptionally useful when using JBOD (which had no way of knowing that the data is corrupted on disk) rather than RAID (esp. RAID6 which has a performance penalty for certain kind of workloads). |
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