-------- Ursprüngliche Nachricht --------
Von: Bernd <berndman80@xxxxxx>
Gesendet: 2. Mai 2017 22:52:38 MESZ
An: linux-raid@xxxxxxxxxxxxxxx
CC: neilb@xxxxxxx
Betreff: Please Help! Degraded Raid6
Hello,
I have a problem with my degraded raid6 and hope you can help me. Please excuse if my english is not so well...
A few days ago i wanted to boot my server and while booting the electricity fuse dropped out. And my raid 6 was in the state active degraded not started. It was degraded with 7 of 8 devices before the crash. I was able to boot with the 7 devices and had all my data. Now when booting all devices are spares and when ich do mdadm --run --force /dev/md0 the state is active degraded not started. Im not able to run the raid and can't touch my data. Add or readd the removed device is denied. System removed it a time ago without my help...think i have to recreate with one missing device. And think a have lost my superblocks...Please help. Dont know what to do. Don't want loose all my data! ...thank you for your help Bernd
This is what i tried:
berndman@berndman:~$ sudo mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Wed Dec 19 20:39:11 2012
Raid Level : raid6
Used Dev Size : 1953509376 (1863.01 GiB 2000.39 GB)
Raid Devices : 8
Total Devices : 7
Persistence : Superblock is persistent
Update Time : Fri Mar 31 14:56:50 2017
State : active, degraded, Not Started
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 4096K
Name : berndman:0 (local to host berndman)
UUID : 26f8d8f1:530a3a85:31e4df5e:adc64cb8
Events : 1686
Number Major Minor RaidDevice State
0 8 81 0 active sync /dev/sdf1
1 8 49 1 active sync /dev/sdd1
8 8 1 2 active sync /
dev/sda1
3 8 65 3 active sync /dev/sde1
4 8 129 4 active sync /dev/sdi1
5 8 33 5 active sync /dev/sdc1
6 8 17 6 active sync /dev/sdb1
7 0 0 7 removed
berndman@berndman:~$ sudo cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : inactive sdi1[4] sda1[8] sdd1[1] sde1[3] sdf1[0] sdc1[5] sdb1[6]
13674587752 blocks super 1.2
unused devices: <none>
berndman@berndman:~$ sudo mdadm --run /dev/md0
mdadm: failed to run array /dev/md0: Input/output error
berndman@berndman:~$ sudo mdadm --examine /dev/sd[a-z]
/dev/sda:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdb:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdc:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdd:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sde:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdf:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdg:
MBR Magic : aa55
Partition[0] : 73969664 sectors at 2048 (type 83)
Partition[1] : 4190210 sectors at 73973758 (type 05)
/dev/sdh:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x2
Array UUID : 26f8d8f1:530a3a85:31e4df5e:adc64cb8
Name : berndman:0 (local to host berndman)
Creation Time : Wed Dec 19 20:39:11 2012
Raid Level : raid6
Raid Devices : 8
Avail Dev Size : 3907027120 (1863.02 GiB 2000.40 GB)
Array Size : 23442112512 (11178.07 GiB 12002.36 GB)
Used Dev Size : 3907018752 (1863.01 GiB 2000.39 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Recovery Offset : 0 sectors
State : clean
Device UUID : 0be2a583:659bbe6e:7d8c93dc:6592505b
Update Time : Fri Jul 10 22:32:34 2015
Checksum : b60eeb71 - correct
Events : 607
Layout : left-symmetric
Chunk Size : 4096K
Device Role : Active device 7
Array State : AAAAAAAA ('A' == active, '.' == missing)
/dev/sdi:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
berndman@berndman:~$ sudo mdadm --assemble --run --force /dev/md0 /dev/sd[abcdefi]1
mdadm: cannot open device /dev/sda1: Device or resource busy
mdadm: /dev/sda1 has no superblock - assembly aborted
berndman@berndman:~$
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