> Your next operations are:
>
> mdadm --stop /dev/md3
>
> mdadm -v --assemble --update=revert-reshape /dev/md3 /dev/sd[a-i]3
>
> If successful, it should begin rebuilding onto /dev/sda3 (role 8).
>
> If the above fails, repeat with --force. If that fails show the output
> and do nothing else.
>
> Phil
# mdadm --stop /dev/md3
mdadm: stopped /dev/md3
# mdadm -v --assemble --update=revert-reshape /dev/md3 /dev/sd[a-i]3
mdadm: looking for devices for /dev/md3
mdadm: /dev/sda3 is identified as a member of /dev/md3, slot -1.
mdadm: /dev/sdb3 is identified as a member of /dev/md3, slot 6.
mdadm: /dev/sdc3 is identified as a member of /dev/md3, slot 7.
mdadm: /dev/sdd3 is identified as a member of /dev/md3, slot 4.
mdadm: /dev/sde3 is identified as a member of /dev/md3, slot 5.
mdadm: /dev/sdf3 is identified as a member of /dev/md3, slot 0.
mdadm: /dev/sdg3 is identified as a member of /dev/md3, slot 3.
mdadm: /dev/sdh3 is identified as a member of /dev/md3, slot 2.
mdadm: /dev/sdi3 is identified as a member of /dev/md3, slot 1.
mdadm: added /dev/sdi3 to /dev/md3 as 1
mdadm: added /dev/sdh3 to /dev/md3 as 2
mdadm: added /dev/sdg3 to /dev/md3 as 3
mdadm: added /dev/sdd3 to /dev/md3 as 4
mdadm: added /dev/sde3 to /dev/md3 as 5
mdadm: added /dev/sdb3 to /dev/md3 as 6
mdadm: added /dev/sdc3 to /dev/md3 as 7
mdadm: no uptodate device for slot 16 of /dev/md3
mdadm: no uptodate device for slot 18 of /dev/md3
mdadm: no uptodate device for slot 20 of /dev/md3
mdadm: added /dev/sda3 to /dev/md3 as -1
mdadm: added /dev/sdf3 to /dev/md3 as 0
mdadm: /dev/md3 assembled from 8 drives and 1 spare - not enough to start the array.
# mdadm -v --assemble --update=revert-reshape --force /dev/md3 /dev/sd[a-i]3
mdadm: looking for devices for /dev/md3
mdadm: /dev/sda3 is identified as a member of /dev/md3, slot -1.
mdadm: /dev/sdb3 is identified as a member of /dev/md3, slot 6.
mdadm: /dev/sdc3 is identified as a member of /dev/md3, slot 7.
mdadm: /dev/sdd3 is identified as a member of /dev/md3, slot 4.
mdadm: /dev/sde3 is identified as a member of /dev/md3, slot 5.
mdadm: /dev/sdf3 is identified as a member of /dev/md3, slot 0.
mdadm: /dev/sdg3 is identified as a member of /dev/md3, slot 3.
mdadm: /dev/sdh3 is identified as a member of /dev/md3, slot 2.
mdadm: /dev/sdi3 is identified as a member of /dev/md3, slot 1.
mdadm: added /dev/sdi3 to /dev/md3 as 1
mdadm: added /dev/sdh3 to /dev/md3 as 2
mdadm: added /dev/sdg3 to /dev/md3 as 3
mdadm: added /dev/sdd3 to /dev/md3 as 4
mdadm: added /dev/sde3 to /dev/md3 as 5
mdadm: added /dev/sdb3 to /dev/md3 as 6
mdadm: added /dev/sdc3 to /dev/md3 as 7
mdadm: no uptodate device for slot 16 of /dev/md3
mdadm: no uptodate device for slot 18 of /dev/md3
mdadm: no uptodate device for slot 20 of /dev/md3
mdadm: added /dev/sda3 to /dev/md3 as -1
mdadm: added /dev/sdf3 to /dev/md3 as 0
mdadm: /dev/md3 assembled from 8 drives and 1 spare - not enough to start the array.
# mdadm --examine /dev/sd?3
/dev/sda3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : c0155214:a9c8e378:d368b6f6:735048a8
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 952aa5ef - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : spare
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 375d85e2:9077dd68:bc1327af:8fee4112
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Checksum : 75b9e502 - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 6
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 67cd2bfa:affa578c:e0c1286a:bd4d2627
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 80c8e5f0 - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 7
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 4490843e:d2c5c2e7:d222fa0a:f98b277c
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Checksum : 165712cf - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sde3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 1d41056f:88149b1a:48e939e5:8c775e23
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Checksum : fb26c467 - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdf3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : fa7c541d:a25babd8:14ffe1c0:c6c1578c
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Checksum : ac27a760 - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdg3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : a4b8b425:b0307fe5:9eb8e3ac:ae985311
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Checksum : 3259488d - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdh3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 345b0212:6c3a0ae8:d8ed9273:ecc53573
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Checksum : 49c35750 - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdi3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 10
Avail Dev Size : 7799105167 (3718.90 GiB 3993.14 GB)
Array Size : 35095924224 (33470.08 GiB 35938.23 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 251904 sectors
New Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 70afdaad:b0979fb1:1b99ef18:dd58cc3a
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : -1 (11->10)
Update Time : Fri Nov 6 16:53:06 2015
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 1c2c4756 - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdj3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x45
Array UUID : 9bdc0939:483889af:b67c199b:2aaecb4e
Name : ubuntu:3
Creation Time : Thu Jul 24 16:06:32 2014
Raid Level : raid5
Raid Devices : 11
Avail Dev Size : 7799094927 (3718.90 GiB 3993.14 GB)
Array Size : 38995471360 (37188.98 GiB 39931.36 GB)
Used Dev Size : 7799094272 (3718.90 GiB 3993.14 GB)
Data Offset : 262144 sectors
New Offset : 251904 sectors
Super Offset : 8 sectors
State : clean
Device UUID : a5f2cea8:a89c88a0:0dd3900c:624f0491
Internal Bitmap : 8 sectors from superblock
Reshape pos'n : 0
Delta Devices : 1 (10->11)
Update Time : Fri Nov 6 16:53:06 2015
Checksum : 4fda6fb3 - correct
Events : 21586
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 9
Array State : AAAAAAAA.A. ('A' == active, '.' == missing, 'R' == replacing)
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