From: Theophanis Kontogiannis <tkonto@gmail.com>
To: linux-raid@vger.kernel.org
Subject: Problem with RAID-5 not adding disks
Date: Wed, 23 Jul 2014 01:11:31 +0300 [thread overview]
Message-ID: <53CEE193.60409@gmail.com> (raw)
In-Reply-To: <53CEE0E4.4070906@gmail.com>
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
next parent reply other threads:[~2014-07-22 22:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <53CEE0E4.4070906@gmail.com>
2014-07-22 22:11 ` Theophanis Kontogiannis [this message]
2014-07-23 0:10 ` Problem with RAID-5 not adding disks Roger Heflin
2014-07-23 17:58 ` Theophanis Kontogiannis
2014-07-24 0:06 ` Roger Heflin
2014-07-24 15:31 ` Theophanis Kontogiannis
2014-07-24 17:39 ` Theophanis Kontogiannis
2014-07-24 19:20 ` Roger Heflin
2014-07-24 19:50 ` Robin Hill
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=53CEE193.60409@gmail.com \
--to=tkonto@gmail.com \
--cc=linux-raid@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.