2017-03-17 16:37 GMT+01:00 Brassow Jonathan <jbrassow@xxxxxxxxxx>: > There is a device-mapper target that is designed to do precisely this - dm-integrity (see dm-devel mailing list). It currently being developed as part of an authenticated encryption project, but could be used for this too. Note that there is a performance penalty that comes from emulating this. Probably something similar could be obtained by checking, during a scrub, the majority of responses from all replica A sort of quorum If you have a 3 way mirror, and 2 disks reply with "1" and another reply with "0", the disk with "0" has triggered a bit rot Is mdadm able to make this decision? In a 2 way mirror would be impossible, as you can't know which disk has the correct data, but in a 3 way mirrors you have a majority. Probably the same could be done in RAID-6, where you have 2 parity to evaluate. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
