Dear List.
Hello.
I have the following problem with my CEntOS 6.5 RAID-5
Array of five disks.
At some point in time I added the fifth disk, however I do not remember
if I added it as a spare or to go up to RAID-6.
The power and faulty UPS caught me so my RAID-5 has failed (alongside
with the on board controller :) )
After replacing the MB, I am in the following situation:
/dev/md0:
Version : 1.2
Creation Time : Fri Feb 21 18:06:31 2014
Raid Level : raid5
Used Dev Size : 976630272 (931.39 GiB 1000.07 GB)
Raid Devices : 5
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Sat Jul 12 22:11:39 2014
State : active, FAILED, Not Started
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : tweety.example.com:0 (local to host
tweety.example.com)
UUID : 953836cd:23314476:5db06922:c886893d
Events : 16855
Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 32 1 active sync /dev/sdc
2 0 0 2 removed
4 8 64 3 active sync /dev/sde
4 0 0 4 removed
Every effort to add at least one more disk ends up in error:
[root ~]# mdadm /dev/md0 --re-add /dev/sdd
mdadm: --re-add for /dev/sdd to /dev/md0 is not possible
I also made sure that the devices are in the correct physical order.
mdadm --examine /dev/sd[b-f]
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x2
Array UUID : 953836cd:23314476:5db06922:c886893d
Name : tweety.example.com:0 (local to host
tweety.example.com)
Creation Time : Fri Feb 21 18:06:31 2014
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 1953260911 (931.39 GiB 1000.07 GB)
Array Size : 3906521088 (3725.55 GiB 4000.28 GB)
Used Dev Size : 1953260544 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Recovery Offset : 0 sectors
State : active
Device UUID : 7117d844:783abda5:093ee4d9:ba0ac2f0
Update Time : Sat Jul 12 21:32:42 2014
Checksum : 31569c40 - correct
Events : 16845
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAA ('A' == active, '.' == missing)
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 953836cd:23314476:5db06922:c886893d
Name : tweety.example.com:0 (local to host
tweety.example.com)
Creation Time : Fri Feb 21 18:06:31 2014
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 1953263024 (931.39 GiB 1000.07 GB)
Array Size : 3906521088 (3725.55 GiB 4000.28 GB)
Used Dev Size : 1953260544 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 18bf4347:08c262ec:694eba7f:eb8e6b26
Update Time : Sat Jul 12 22:11:39 2014
Checksum : 55e8716a - correct
Events : 16855
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : .AAAA ('A' == active, '.' == missing)
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 953836cd:23314476:5db06922:c886893d
Name : tweety.example.com:0 (local to host
tweety.example.com)
Creation Time : Fri Feb 21 18:06:31 2014
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 1953263024 (931.39 GiB 1000.07 GB)
Array Size : 3906521088 (3725.55 GiB 4000.28 GB)
Used Dev Size : 1953260544 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 4f77c847:2f567632:66bb5600:9fb2eeba
Update Time : Sat Jul 12 21:32:42 2014
Checksum : b19f455b - correct
Events : 16855
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAAA ('A' == active, '.' == missing)
/dev/sde:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 953836cd:23314476:5db06922:c886893d
Name : tweety.example.com:0 (local to host
tweety.example.com)
Creation Time : Fri Feb 21 18:06:31 2014
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 1953263024 (931.39 GiB 1000.07 GB)
Array Size : 3906521088 (3725.55 GiB 4000.28 GB)
Used Dev Size : 1953260544 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 51b43b6e:7bb8a070:f6375540:28e0b75c
Update Time : Sat Jul 12 22:11:39 2014
Checksum : f80197e3 - correct
Events : 16855
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : .A.AA ('A' == active, '.' == missing)
/dev/sdf:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 953836cd:23314476:5db06922:c886893d
Name : tweety.example.com:0 (local to host
tweety.example.com)
Creation Time : Fri Feb 21 18:06:31 2014
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 1953263024 (931.39 GiB 1000.07 GB)
Array Size : 3906521088 (3725.55 GiB 4000.28 GB)
Used Dev Size : 1953260544 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 9f7b1355:936e12f2:813c83a0:13854a6b
Update Time : Sat Jul 12 22:11:39 2014
Checksum : cf0bbec1 - correct
Events : 16855
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : .A.AA ('A' == active, '.' == missing)
Any chance to revive this array?
--
Kind Regards,
Theophanis Kontogiannis
ΜΦΧ
ΘΚ
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