On 8/8/17 3:27 PM, Bryan Hepworth wrote:
Hi all
I'd be grateful of another pair of eyes just to check and verify what I'm thinking. I've had an array fail and I've checked the components with the mdadm --examine command. Five out of the six event counts are correct and I'm hoping I can get it to assemble with the force option: -
"mdadm --assemble --force /dev/mdX <list of devices>"
mdadm --assemble --force /dev/md0 /dev/sdd1 /dev/sdg1 /dev/sdf1 /dev/sde1 /dev/sdb1 /dev/sdc1
I don't think you need to explicitly list the devices (/dev/sd(..)) in
the force
You could do something like this:
mdadm --examine --scan | grep md0 > /tmp/md0.conf
mdadm -As -c /tmp/md0.conf
if this doesn't work, then the force *may* be an option, but be very
careful with this.
Output from --examine is as follows: -
[root@inscribe4 dev]# mdadm --examine /dev/sde1
/dev/sde1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : ace00fb5:8771d55a:cf36728b:ddc3ce89
Name : intermediate0
Creation Time : Tue Oct 15 21:03:50 2013
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 3906761858 (1862.89 GiB 2000.26 GB)
Array Size : 9766901760 (9314.44 GiB 10001.31 GB)
Used Dev Size : 3906760704 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1154 sectors
State : clean
Device UUID : 8d0b6c8e:0c526265:6ec0a71b:52a636ba
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Aug 8 14:16:53 2017
Checksum : 44b7b461 - correct
Events : 119894
Layout : left-symmetric
Chunk Size : 512K
Device Role : spare
Array State : AAA.A. ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe4 dev]# mdadm --examine /dev/sdg1
/dev/sdg1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : ace00fb5:8771d55a:cf36728b:ddc3ce89
Name : intermediate0
Creation Time : Tue Oct 15 21:03:50 2013
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 3906761858 (1862.89 GiB 2000.26 GB)
Array Size : 9766901760 (9314.44 GiB 10001.31 GB)
Used Dev Size : 3906760704 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1154 sectors
State : clean
Device UUID : e238e74b:d40efc43:d34d876d:ca0700b0
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Aug 8 14:16:53 2017
Checksum : 28758d54 - correct
Events : 119894
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAA.A. ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe4 dev]# mdadm --examine /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : ace00fb5:8771d55a:cf36728b:ddc3ce89
Name : intermediate0
Creation Time : Tue Oct 15 21:03:50 2013
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 3906761858 (1862.89 GiB 2000.26 GB)
Array Size : 9766901760 (9314.44 GiB 10001.31 GB)
Used Dev Size : 3906760704 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1154 sectors
State : clean
Device UUID : 1732f121:f6f0df09:fafd2411:7c78ce00
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Aug 8 14:16:53 2017
Checksum : b8cf8981 - correct
Events : 119894
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAA.A. ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe4 dev]# mdadm --examine /dev/sdf1
/dev/sdf1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : ace00fb5:8771d55a:cf36728b:ddc3ce89
Name : intermediate0
Creation Time : Tue Oct 15 21:03:50 2013
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 3906761858 (1862.89 GiB 2000.26 GB)
Array Size : 9766901760 (9314.44 GiB 10001.31 GB)
Used Dev Size : 3906760704 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1154 sectors
State : clean
Device UUID : 3d414ad2:4310c1f9:98f50214:3e9b1e33
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Aug 8 14:16:53 2017
Checksum : 8e37d25d - correct
Events : 119894
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAA.A. ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe4 dev]# mdadm --examine /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : ace00fb5:8771d55a:cf36728b:ddc3ce89
Name : intermediate0
Creation Time : Tue Oct 15 21:03:50 2013
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 3906761858 (1862.89 GiB 2000.26 GB)
Array Size : 9766901760 (9314.44 GiB 10001.31 GB)
Used Dev Size : 3906760704 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1154 sectors
State : clean
Device UUID : a84263cd:75ce20b9:a3a72a1c:b18b2457
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jul 31 22:50:37 2017
Checksum : 74d320d6 - correct
Events : 119879
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AAA.AA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe4 dev]# mdadm --examine /dev/sdc1
/dev/sdc1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : ace00fb5:8771d55a:cf36728b:ddc3ce89
Name : intermediate0
Creation Time : Tue Oct 15 21:03:50 2013
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 3906761858 (1862.89 GiB 2000.26 GB)
Array Size : 9766901760 (9314.44 GiB 10001.31 GB)
Used Dev Size : 3906760704 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1154 sectors
State : clean
Device UUID : be5ec20e:249645e5:22aeca25:a60c7599
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Aug 8 14:16:53 2017
Checksum : 2e529fae - correct
Events : 119894
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAA.A. ('A' == active, '.' == missing, 'R' == replacing)
Thanks
Bryan
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