Hi all,
Context:
On my RAID5 sdc was faulty. I bought a new HD, format it and add it to
my raid array. However during the rebuilding sda was detected as
faulty. Now I am not sure what to do...
I followed the steps from the wiki. See at the end my question ;-)
Thanks for your help.
$ uname -a
Linux htpc 3.8.0-35-generic #52~precise1-Ubuntu SMP Thu Jan 30
17:27:28 UTC 2014 i686 i686 i386 GNU/Linux
$ mdadm --version
mdadm - v3.2.5 - 18th May 2012
$ sudo mdadm --detail /dev/md1
/dev/md1:
Version : 0.90
Creation Time : Sun Jan 2 08:47:01 2011
Raid Level : raid5
Array Size : 5842101312 (5571.46 GiB 5982.31 GB)
Used Dev Size : 1947367104 (1857.15 GiB 1994.10 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Sat Oct 24 23:36:30 2015
State : clean, FAILED
Active Devices : 2
Working Devices : 3
Failed Devices : 1
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 64K
UUID : 426d71a2:5b25a168:a4e2eff2:d305f1c1
Events : 0.20213
Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 19 1 active sync /dev/sdb3
2 0 0 2 removed
3 8 51 3 active sync /dev/sdd3
4 8 35 - spare /dev/sdc3
5 8 3 - faulty spare /dev/sda3
$ mdadm --examine /dev/sd[abcdefghijklmn]3 >> raid.status
http://pastebin.com/qaP8bvna
$ sudo mdadm --examine /dev/sd[a-z] | egrep 'Event|/dev/sd'
/dev/sda:
/dev/sdb:
/dev/sdc:
/dev/sdd:
/dev/sde:
I seems that some blocks of sda are not readable.Cf from dmesg
"[17852.126321] end_request: I/O error, dev sda, sector 1958539264"
Full dmesg available at:
http://pastebin.com/bBfcYjkg
Is there some way to re-add this disk (sda) in the array without mdadm
thinging it is a new one ?
I have seen from the wiki that I could try to recreate the array with
--assume-clean but I want to do that only in last resort.
Thanks,
Guillaume
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