On Thu, 2016-04-07 at 18:00 +0500, Roman Mamedov wrote: > > You do not have a write intent bitmap at md0, so re-add will not > work. Ahhh. OK. > Seems > like you should --add it now, Tried that. It started off and got this far: # cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 md1[2](F) sdd[0] 1953514496 blocks [2/1] [U_] [================>....] recovery = 82.0% (1602507648/1953514496) finish=42613.2min speed=137K/sec before hitting this: 2016 Apr 7 12:01:00 linux [16583.606363] md/raid1:md0: Disk failure on md1, disabling device. 2016 Apr 7 12:01:00 linux [16583.606366] md/raid1:md0: Operation continuing on 1 devices. 2016 Apr 7 12:01:00 linux FailSpare event detected on md device /dev/md0, component device /dev/md1 2016 Apr 7 12:01:01 linux [16583.907982] BUG: unable to handle kernel paging request at 0000000099b899b8 2016 Apr 7 12:01:01 linux [16583.908009] IP: [<ffffffffa0019227>] call_bio_endio+0x37/0xb0 [raid1] 2016 Apr 7 12:01:01 linux [16583.908009] Oops: 0000 [#1] SMP 2016 Apr 7 12:01:01 linux [16583.908009] Stack: 2016 Apr 7 12:01:01 linux [16583.908009] Call Trace: 2016 Apr 7 12:01:01 linux [16583.908009] Code: 4c 89 65 e0 4c 89 6d e8 4c 89 75 f0 4c 89 7d f8 66 66 66 66 90 4c 8b 67 28 48 8b 47 20 41 bf 01 00 00 00 48 89 fb 41 8b 54 24 2c <4c> 8b 28 85 d2 75 42 48 8b 43 18 a8 01 75 07 3e 41 80 64 24 18 2016 Apr 7 12:01:01 linux [16583.908009] RIP [<ffffffffa0019227>] call_bio_endio+0x37/0xb0 [raid1] 2016 Apr 7 12:01:01 linux [16583.908009] CR2: 0000000099b899b8 And it seems to be stuck there now. dmesg contents at http://www.interlinx.bc.ca/~brian/raid-dmesg.txt > then after it rebuilds use --grow to add a > bitmap, so that in the future you could use -re-add. Cool. Will do, when this finally gets fixed. > As to why the situation occured in the first place, you should ensure > that md1 > assembles before md0. Yeah. Just noticed as of this incident that the order in mdadm.conf is wrong. :-( Cheers, b.
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