Hi,
got a drive failure (bad block) during Raid5 grow (4x3TB -> 5x3TB).
Well... i don't have a backup file :/
Mdadm shows 1 drive as removed.
All 4 'good' drives are in the same reshape pos'n.
Any idea how to finish the reshape process? Or get the array back?
mdadm --examine /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x4
Array UUID : 14e9502c:4d51fb5c:a4f2e4d1:2b6a157e
Name : MyRaid:0
Creation Time : Mon Mar 18 12:52:00 2013
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 5860271024 (2794.40 GiB 3000.46 GB)
Array Size : 11720540160 (11177.58 GiB 12001.83 GB)
Used Dev Size : 5860270080 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 705995da:442a6d8d:783abc2f:9d88e715
Reshape pos'n : 9243070464 (8814.88 GiB 9464.90 GB)
Delta Devices : 1 (4->5)
Update Time : Fri Oct 31 13:21:48 2014
Checksum : 82973929 - correct
Events : 18837
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : .AAAA ('A' == active, '.' == missing)
mdadm -detail:
/dev/md0:
Version : 1.2
Creation Time : Mon Mar 18 12:52:00 2013
Raid Level : raid5
Used Dev Size : -1
Raid Devices : 5
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Fri Oct 31 13:21:48 2014
State : active, degraded, Not Started
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Delta Devices : 1, (4->5)
Name : MyRaid:0
UUID : 14e9502c:4d51fb5c:a4f2e4d1:2b6a157e
Events : 18837
Number Major Minor RaidDevice State
0 0 0 0 removed
5 8 48 1 active sync /dev/sdd
3 8 32 2 active sync /dev/sdc
4 8 80 3 active sync /dev/sdf
6 8 16 4 active sync /dev/sdb
mdadm -A scan -v:
mdadm: looking for devices for /dev/md/0
mdadm: /dev/sdf is identified as a member of /dev/md/0, slot 3.
mdadm: /dev/sdd is identified as a member of /dev/md/0, slot 1.
mdadm: /dev/sdc is identified as a member of /dev/md/0, slot 2.
mdadm: /dev/sdb is identified as a member of /dev/md/0, slot 4.
mdadm:/dev/md/0 has an active reshape - checking if critical section needs
to be restored
mdadm: too-old timestamp on backup-metadata on device-4
mdadm: no uptodate device for slot 0 of /dev/md/0
mdadm: added /dev/sdc to /dev/md/0 as 2
mdadm: added /dev/sdf to /dev/md/0 as 3
mdadm: added /dev/sdb to /dev/md/0 as 4
mdadm: added /dev/sdd to /dev/md/0 as 1
mdadm: /dev/md/0 assembled from 4 drives - not enough to start the array
while not clean - consider --force.
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