Re: Problem with RAID-5 not adding disks
From: Theophanis Kontogiannis <hidden>
Date: 2014-07-23 17:58:15
Hi Roger,
Thank you for the info.
Results:
[root ~#] mdadm --assemble --force /dev/md0 /dev/sdb /dev/sdc /dev/sdd
/dev/sde /dev/sdf
mdadm: Marking array /dev/md0 as 'clean'
mdadm: failed to add /dev/sdd to /dev/md0: Invalid argument
mdadm: failed to add /dev/sdf to /dev/md0: Invalid argument
mdadm: failed to RUN_ARRAY /dev/md0: Input/output error
[root ~#]
md: sdd does not have a valid v1.2 superblock, not importing!
md: md_import_device returned -22
md: bind<sde>
md: sdf does not have a valid v1.2 superblock, not importing!
md: md_import_device returned -22
md: bind<sdc>
md: kicking non-fresh sdb from array!
md: unbind<sdb>
md: export_rdev(sdb)
bio: create slab <bio-1> at 1
md/raid:md0: device sdc operational as raid disk 1
md/raid:md0: device sde operational as raid disk 3
md/raid:md0: allocated 5366kB
md/raid:md0: not enough operational devices (3/5 failed)
RAID conf printout:
--- level:5 rd:5 wd:2
disk 1, o:1, dev:sdc
disk 3, o:1, dev:sde
md/raid:md0: failed to run raid set.
md: pers->run() failed ...
[root@tweety ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : inactive sdc[1] sde[4]
1953263024 blocks super 1.2
unused devices: <none>
Anything else I could do?
Kind Regards,
Theophanis Kontogiannis
ΜΦΧ
ΘΚ
On 23/07/14 03:10, Roger Heflin wrote:mdadm --stop /dev/mdXX stop mdadm --assemble --force /dev/mdXX <list all devices good or bad that were previously in the array> The assemble with force should make it turn it on with enough disks. Then re-add the remaining. I have had to do this a number of times when a subset of my sata ports acted up. On Tue, Jul 22, 2014 at 5:11 PM, Theophanis Kontogiannis [off-list ref] wrote:quoted
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 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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