2017-04-25 2:16 GMT+02:00, Andreas Klauer <Andreas.Klauer@xxxxxxxxxxxxxx>: > On Tue, Apr 25, 2017 at 01:00:47AM +0200, Patrik Dahlström wrote: >> 6 disk raid xor check: 84 ^ f6 ^ 87 ^ 96 ^ e1 ^ 82 == 0, OK > > This should be the 6 disk raid area. Agreed > >> 5 disk raid xor check: 46 ^ 73 ^ 6d ^ 06 ^ 5e == 0, OK > > This should be the 5 disk raid area. Agreed > >> 6 disk raid xor check: 46 ^ 73 ^ 6d ^ 06 ^ 5e ^ 00 == 0, OK > > Still 5 disks... grow did not progess until here, > and the 6th disk is likely zero because it's new. Agreed > >> But immediately before that, I can't get the xor sums to line up: >> 0xfaa287ffff: b0 ^ 6d ^ 13 ^ 1b ^ b7 != ae (62 actually), NOK >> This would mean that it's incorrect for both 5 and 6 disk raids. > > Not too sure about this point. > > If it up and died in mid-grow there might be a chunk that's wrong. > > But that's a few kilobytes, not... > >> That is a span of ~52 GB where I presumably can't get the checksums >> right. What does all this mean? What am I missing? > > ...well, it would make sense if a disk got kicked / went missing > and it progressed the reshape for another ~52GB afterwards. Would that mean that I should be able to get the checksum to match if I remove one of the values in a mismatching series. I have tried this, but never got it correct. > And you're hoping the VALID DATA areas will overlap. They would if it > progressed far enough with all disks and not too far with one missing. How do I test this? I haven't really used overlays before. > Or you just have to identify the questionable drive and kick it out. I'm still not sure if a drive was actually kicked out of the array. I don't have any memory of discovering that a drive was suddenly kicked out. Would a kicked out drive be automatically re-added if it came back? Shouldn't I find something about it in my syslog or kernel log? I checked my command history and I didn't find any --fail commands (except on /dev/mapper/sdf) Should I post the command history here? It is quite long and doesn't contain return codes or command output. > > You have some experimenteering to do :-| > > ( > Not sure if I'm still making sense at this point. Sorry. > ) > > Regards > Andreas Klauer > -- 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
