On 01/18/2012 06:04 PM, Jan Ceuleers wrote:
List,
I have two 2-partition RAID1 sets, each with a spare. The SMART info
for both active disks suggests that I should replace them. Both of
them. I based this on the Seek_Error_Rate in the smartctl -a output.
I am looking for advice on how best to do this.
OK, so I went for scenario B, and I'm running into a problem on the tail
end of the procedure:
root@zotac:~# mdadm /dev/md0 --grow --raid-devices=2 --spare-devices=1
mdadm:option --spare-devices not valid in grow mode
root@zotac:~# mdadm /dev/md0 --grow --raid-devices=2
mdadm: Cannot set raid-devices for /dev/md0: Device or resource busy
root@zotac:~# mdadm -V
mdadm - v2.6.7.1 - 15th October 2008
root@zotac:~# uname -a
Linux zotac 2.6.35-32-generic #64-Ubuntu SMP Tue Jan 3 00:47:07 UTC 2012
x86_64 GNU/Linux
root@zotac:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
[raid4] [raid10]
md1 : active raid1 sdb3[3] sde2[2] sdd2[0]
487861824 blocks [4/3] [U_UU]
md0 : active raid1 sdb2[3] sde1[2] sdd1[0]
521984 blocks [4/3] [U_UU]
unused devices: <none>
So I'm trying to bring the number of active devices back down to 2 with
1 spare. I was able to increase it from 2+1 to 4+0 earlier. Any suggestions?
Thanks, Jan
root@zotac:~# mdadm -E /dev/sdd1 /dev/sde1 /dev/sdb2
/dev/sdd1:
Magic : a92b4efc
Version : 00.90.00
UUID : c2bfb80c:0cbf5cd9:67c62432:ead2ec0c
Creation Time : Mon Oct 18 11:25:42 2010
Raid Level : raid1
Used Dev Size : 521984 (509.84 MiB 534.51 MB)
Array Size : 521984 (509.84 MiB 534.51 MB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Sun Jan 29 09:38:46 2012
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Checksum : 672c88d4 - correct
Events : 525
Number Major Minor RaidDevice State
this 0 8 49 0 active sync /dev/sdd1
0 0 8 49 0 active sync /dev/sdd1
1 1 0 0 1 faulty removed
2 2 8 65 2 active sync /dev/sde1
3 3 8 18 3 active sync /dev/sdb2
/dev/sde1:
Magic : a92b4efc
Version : 00.90.00
UUID : c2bfb80c:0cbf5cd9:67c62432:ead2ec0c
Creation Time : Mon Oct 18 11:25:42 2010
Raid Level : raid1
Used Dev Size : 521984 (509.84 MiB 534.51 MB)
Array Size : 521984 (509.84 MiB 534.51 MB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Sun Jan 29 09:38:46 2012
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Checksum : 672c88e8 - correct
Events : 525
Number Major Minor RaidDevice State
this 2 8 65 2 active sync /dev/sde1
0 0 8 49 0 active sync /dev/sdd1
1 1 0 0 1 faulty removed
2 2 8 65 2 active sync /dev/sde1
3 3 8 18 3 active sync /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
UUID : c2bfb80c:0cbf5cd9:67c62432:ead2ec0c
Creation Time : Mon Oct 18 11:25:42 2010
Raid Level : raid1
Used Dev Size : 521984 (509.84 MiB 534.51 MB)
Array Size : 521984 (509.84 MiB 534.51 MB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Update Time : Sun Jan 29 09:38:46 2012
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Checksum : 672c88bb - correct
Events : 525
Number Major Minor RaidDevice State
this 3 8 18 3 active sync /dev/sdb2
0 0 8 49 0 active sync /dev/sdd1
1 1 0 0 1 faulty removed
2 2 8 65 2 active sync /dev/sde1
3 3 8 18 3 active sync /dev/sdb2
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