Hi everyone,
I'm really hoping someone can help me and that the array can be saved.
I was trying to grow a RAID 5 array from 3 to 4 drives (I've already successfully grown it once from 2 to 3 drives). However, after running the grow command it was stuck with 'resync=DELAYED'. I eventually rebooted but the array was then inactive and with whatever I've done since the array has now disappeared. Is it possible to salvage this before I make it any worse?
Thanks very much for any help!
Kevin
Some info:
----------
$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid1] [raid10]
unused devices: <none>
----------
$ sudo mdadm --assemble /dev/md1
mdadm: Failed to restore critical section for reshape, sorry.
Possibly you needed to specify the --backup-file
----------
$ sudo mdadm -Q /dev/sdc1
/dev/sdc1: is not an md array
/dev/sdc1: device 0 in 4 device undetected raid5 /dev/.tmp.md1. Use mdadm --examine for more detail.
----------
$ sudo mdadm --examine /dev/sd[acde]1
/dev/sda1:
Magic : a92b4efc
Version : 0.91.00
UUID : ec02c596:7c68f1da:7faca49f:4a711434 (local to host kevin-server)
Creation Time : Tue Jan 11 20:05:16 2011
Raid Level : raid5
Used Dev Size : 1953508352 (1863.01 GiB 2000.39 GB)
Array Size : 5860525056 (5589.03 GiB 6001.18 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Reshape pos'n : 0
Delta Devices : 1 (3->4)
Update Time : Mon Feb 25 18:19:50 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : ee7f7fa5 - correct
Events : 6108
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 1 3 active sync /dev/sda1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 65 1 active sync /dev/sde1
2 2 8 49 2 active sync /dev/sdd1
3 3 8 1 3 active sync /dev/sda1
/dev/sdc1:
Magic : a92b4efc
Version : 0.91.00
UUID : ec02c596:7c68f1da:7faca49f:4a711434 (local to host kevin-server)
Creation Time : Tue Jan 11 20:05:16 2011
Raid Level : raid5
Used Dev Size : 1953508352 (1863.01 GiB 2000.39 GB)
Array Size : 5860525056 (5589.03 GiB 6001.18 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Reshape pos'n : 0
Delta Devices : 1 (3->4)
Update Time : Mon Feb 25 18:19:50 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : ee7f7fbf - correct
Events : 6108
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 8 33 0 active sync /dev/sdc1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 65 1 active sync /dev/sde1
2 2 8 49 2 active sync /dev/sdd1
3 3 8 1 3 active sync /dev/sda1
/dev/sdd1:
Magic : a92b4efc
Version : 0.91.00
UUID : ec02c596:7c68f1da:7faca49f:4a711434 (local to host kevin-server)
Creation Time : Tue Jan 11 20:05:16 2011
Raid Level : raid5
Used Dev Size : 1953508352 (1863.01 GiB 2000.39 GB)
Array Size : 5860525056 (5589.03 GiB 6001.18 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Reshape pos'n : 0
Delta Devices : 1 (3->4)
Update Time : Mon Feb 25 18:19:50 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : ee7f7fd3 - correct
Events : 6108
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 49 2 active sync /dev/sdd1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 65 1 active sync /dev/sde1
2 2 8 49 2 active sync /dev/sdd1
3 3 8 1 3 active sync /dev/sda1
/dev/sde1:
Magic : a92b4efc
Version : 0.91.00
UUID : ec02c596:7c68f1da:7faca49f:4a711434 (local to host kevin-server)
Creation Time : Tue Jan 11 20:05:16 2011
Raid Level : raid5
Used Dev Size : 1953508352 (1863.01 GiB 2000.39 GB)
Array Size : 5860525056 (5589.03 GiB 6001.18 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Reshape pos'n : 0
Delta Devices : 1 (3->4)
Update Time : Mon Feb 25 18:19:50 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : ee7f7fe1 - correct
Events : 6108
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 65 1 active sync /dev/sde1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 65 1 active sync /dev/sde1
2 2 8 49 2 active sync /dev/sdd1
3 3 8 1 3 active sync /dev/sda1
----------
I also noticed that /dev/sda seems to have been added:
$ sudo mdadm --examine /dev/sd[acde]
/dev/sda:
Magic : a92b4efc
Version : 0.91.00
UUID : ec02c596:7c68f1da:7faca49f:4a711434 (local to host kevin-server)
Creation Time : Tue Jan 11 20:05:16 2011
Raid Level : raid5
Used Dev Size : 1953508352 (1863.01 GiB 2000.39 GB)
Array Size : 5860525056 (5589.03 GiB 6001.18 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Reshape pos'n : 0
Delta Devices : 1 (3->4)
Update Time : Mon Feb 25 18:19:50 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : ee7f7fa5 - correct
Events : 6108
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 1 3 active sync /dev/sda1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 65 1 active sync /dev/sde1
2 2 8 49 2 active sync /dev/sdd1
3 3 8 1 3 active sync /dev/sda1
/dev/sdc:
MBR Magic : aa55
Partition[0] : 3907016904 sectors at 56 (type 83)
/dev/sdd:
MBR Magic : aa55
Partition[0] : 3907016904 sectors at 56 (type 83)
/dev/sde:
MBR Magic : aa55
Partition[0] : 3907016904 sectors at 56 (type 83)--
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