On Thu, 14 Apr 2016 16:03:59 +0300 Dag Nygren <dag@xxxxxxxxxx> wrote: > Hi! > > Have set up a RAID1 here for temporary storage of some backup files. > As I am using Seagate barracudas I am prepared for sector errors :-). > that's why I am using RAID1. > > Anyway I do get those occasional "Pending Reallocate" with > the appropriate corresponding > Unrecovered read error - auto reallocate failed > in the log. > > A resync of the array will rewrite the failing sector > and the drive seems to reallocate it and all is fine again . > > But I was expecting the MD layer to try to fixup that sector > automatically by using the data from the other drive ?? > > Is there something I need to explicitly enable? > Or am I expecting too much ;-) I have seen this behavior too. The only somewhat logical explanation that I have, is that some drives are only able to remap bad sectors if a larger area around the sector is overwritten, and not just the sector itself. But this is not scientific or verified. -- With respect, Roman
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