vgracanin |
08-25-2017 03:33 AM |
RAID 10 Array unable to start
Hi,
I had an RAID 10 Array on 4x4TB drives. One of the drives failed recently and before I had a chance to get a new drive the PC died. Now I took those 3 working drives in a different machine and tried to assemble the array, however it is showing me that there is not enough drives to start the array.
mdadm --assemble --scan -v
Code:
mdadm: looking for devices for /dev/md/2
mdadm: /dev/sdd2 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdd1 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdd is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdc2 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdc1 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdc is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdb2 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdb1 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdb is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sda5 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sda2 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sda1 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sda is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sr0 is not one of /dev/sdd3,/dev/sdc3,/dev/sdb3
mdadm: /dev/sdd3 is identified as a member of /dev/md/2, slot 3.
mdadm: /dev/sdc3 is identified as a member of /dev/md/2, slot 2.
mdadm: /dev/sdb3 is identified as a member of /dev/md/2, slot 32769.
mdadm: no uptodate device for slot 0 of /dev/md/2
mdadm: no uptodate device for slot 2 of /dev/md/2
mdadm: added /dev/sdd3 to /dev/md/2 as 3
mdadm: added /dev/sdc3 to /dev/md/2 as 2
mdadm: /dev/md/2 assembled from 2 drives - not enough to start the array.
mdadm --examine /dev/sdd3
Code:
/dev/sdd3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : cd3892ab:b8aaa48a:20b5ab74:fddad0bb
Name : Vault:2
Creation Time : Sun Jun 12 08:36:56 2016
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 7804393120 (3721.42 GiB 3995.85 GB)
Array Size : 7804393088 (7442.85 GiB 7991.70 GB)
Used Dev Size : 7804393088 (3721.42 GiB 3995.85 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=32 sectors
State : clean
Device UUID : 8592628e:a97edfef:e6986718:30843c2a
Update Time : Mon Jul 17 02:06:30 2017
Checksum : fd90c0a - correct
Events : 97672
Layout : near=2
Chunk Size : 64K
Device Role : Active device 3
Array State : ..AA ('A' == active, '.' == missing, 'R' == replacing)
mdadm --examine /dev/sdc3
Code:
/dev/sdc3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : cd3892ab:b8aaa48a:20b5ab74:fddad0bb
Name : Vault:2
Creation Time : Sun Jun 12 08:36:56 2016
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 7804393120 (3721.42 GiB 3995.85 GB)
Array Size : 7804393088 (7442.85 GiB 7991.70 GB)
Used Dev Size : 7804393088 (3721.42 GiB 3995.85 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=32 sectors
State : clean
Device UUID : c37c9709:1f048b35:f3133e80:7d0d585d
Update Time : Mon Jul 17 02:06:30 2017
Checksum : 6bab8016 - correct
Events : 97672
Layout : near=2
Chunk Size : 64K
Device Role : Active device 2
Array State : ..AA ('A' == active, '.' == missing, 'R' == replacing)
mdadm --examine /dev/sdb3
Code:
/dev/sdb3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : cd3892ab:b8aaa48a:20b5ab74:fddad0bb
Name : Vault:2
Creation Time : Sun Jun 12 08:36:56 2016
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 7804393120 (3721.42 GiB 3995.85 GB)
Array Size : 7804393088 (7442.85 GiB 7991.70 GB)
Used Dev Size : 7804393088 (3721.42 GiB 3995.85 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=32 sectors
State : clean
Device UUID : 56d45c15:883a2c28:96b265ad:341003bb
Update Time : Mon Jul 17 02:06:30 2017
Checksum : f4e4bb8b - correct
Events : 97672
Layout : near=2
Chunk Size : 64K
Device Role : Active device 32769
Array State : ..AA ('A' == active, '.' == missing, 'R' == replacing)
The only difference I can see is in the sdb3 is the "Device Role : Active device 32769"
Just to note that the RAID was on synology (xpenology).
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