* mdadm remove old md details reassemble working drives
@ 2016-05-26 9:56 Bryan Hepworth
2016-05-26 11:41 ` Andreas Klauer
0 siblings, 1 reply; 3+ messages in thread
From: Bryan Hepworth @ 2016-05-26 9:56 UTC (permalink / raw)
To: linux-raid@vger.kernel.org
Hi
Hopefully this will be fairly straight forward. I have a machine that has had hardware added over the course of its existence before I took over. There is an issue with two of the shelves that means that they aren't starting automatically and after digging around I think I know the reason why.
When the raid array was created it would have listed the drives in order /dev/sdb /dev/sdc /dev/sdd etc however at some point it has jumped and the device names have changed. The raid arrays are both currently offline, but running the mdadm --examine command shows that they are all present and correct and all in step with each other just with different device names to /etc/mdadm.conf to what they are in reality. I'd like another pair of eyes to have a look before I commit to making changes. The arrays are formatted as xfs and I've had problems with that in the past so want to be sure.
My question is how do I go about getting the arrays back up? After reading the notes it would appear I would have to re-assemble the drives as follows, is this correct?
mdadm --stop /dev/md130
mdadm --stop /dev/md130
mdadm --assemble /dev/md130 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdp /dev/sdq /dev/sdr /dev/sds
mdadm --assemble /dev/md136 /dev/sdt /dev/sdu /dev/sdv /dev/sdw /dev/sdx /dev/sdy /dev/sdz /dev/sdaa /dev/sdab /dev/sdac /dev/sdad /dev/sdae
mdadm --detail --scan >> /etc/mdadm.conf
Here's the output from various commands that I believe are the important ones.
Thanks
Bryan
/etc/mdadm.conf
[root@inscribe5 etc]# cat mdadm.conf
ARRAY /dev/md/inscribe5.ncl.ac.uk:130 level=raid5 num-devices=12 metadata=1.2 name=inscribe5.ncl.ac.uk:130 UUID=cb850648:d5b35007:dc6000f0:b48ab578
devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf,/dev/sdg,/dev/sdh,/dev/sdi,/dev/sdj,/dev/sdk,/dev/sdl,/dev/sdm
ARRAY /dev/md/igmimager.ncl.ac.uk:136 level=raid5 num-devices=12 metadata=1.2 name=igmimager.ncl.ac.uk:136 UUID=b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
devices=/dev/sdn,/dev/sdo,/dev/sdp,/dev/sdq,/dev/sdr,/dev/sds,/dev/sdt,/dev/sdu,/dev/sdv,/dev/sdw,/dev/sdx,/dev/sdy
[root@inscribe5 etc]#
/proc/mdstat
[root@inscribe5 ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md126 : inactive sdo[2](S) sdn[4](S)
3906767024 blocks super 1.2
md127 : active (auto-read-only) raid5 sdm1[4](F) sdl1[2](F) sdk1[1](F) sdj1[0](F)
5860142592 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/0] [____]
bitmap: 0/15 pages [0KB], 65536KB chunk
md136 : active (auto-read-only) raid5 super 1.2 level 5, 512k chunk, algorithm 2 [12/0] [____________]
bitmap: 0/30 pages [0KB], 65536KB chunk
md130 : active (auto-read-only) raid5 super 1.2 level 5, 512k chunk, algorithm 2 [12/0] [____________]
bitmap: 0/30 pages [0KB], 65536KB chunk
mdadm --examine Output
[root@inscribe5 etc]# mdadm --examine /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : a7ece5a2:cd52d443:15fca242:f9849df7
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 9c7c0559 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdc
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 135b7c93:88cd0e38:0e86b868:a12f2416
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : c5e92321 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdd
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : b78cd05e:c441f2ee:e7893ce2:a1a4755e
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 9f641dd - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sde
/dev/sde:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : cd686c04:311bb2ed:cdc54888:07883b40
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 362416ac - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdf
/dev/sdf:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : f183d0da:207286e1:08399567:916810e1
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 807ddc86 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdg
/dev/sdg:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 2872da1b:1ed23064:c7a72b7d:f35e7a44
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : bd328fdb - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdh
/dev/sdh:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : cdba7e4f:07758d88:2911bba3:ff668906
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : fdd1ecd8 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 6
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdi
/dev/sdi:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 41dd6007:5dd339f2:b8eff43e:d82d9365
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 19a4130c - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 7
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdj
mdadm: cannot open /dev/sdj: No such file or directory
[root@inscribe5 etc]# mdadm --examine /dev/sdk
mdadm: cannot open /dev/sdk: No such file or directory
[root@inscribe5 etc]# mdadm --examine /dev/sdl
mdadm: cannot open /dev/sdl: No such file or directory
[root@inscribe5 etc]# mdadm --examine /dev/sdm
mdadm: cannot open /dev/sdm: No such file or directory
[root@inscribe5 etc]# mdadm --examine /dev/sdn
mdadm: cannot open /dev/sdn: No such file or directory
[root@inscribe5 etc]# mdadm --examine /dev/sdo
mdadm: cannot open /dev/sdo: No such file or directory
[root@inscribe5 etc]# mdadm --examine /dev/sdp
/dev/sdp:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : e8b00d6f:157a23c0:638f2508:f75ad939
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : ecb15a35 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 8
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdq
/dev/sdq:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : b9da41fa:adefe7b5:360a8993:57fabddb
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 9af213d4 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 9
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdr
/dev/sdr:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : c5d26859:108844a1:0dd6db16:8e2616b8
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 45209c51 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 10
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sds
/dev/sds:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : cb850648:d5b35007:dc6000f0:b48ab578
Name : inscribe5.ncl.ac.uk:130 (local to host inscribe5.ncl.ac.uk)
Creation Time : Thu May 28 12:17:06 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 4213b169:062dfa7c:c62ef36c:c6110735
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:27 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 426c5b7 - correct
Events : 31406
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 11
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdt
/dev/sdt:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : f72233d4:2a14c7e3:95f4ca36:61db22e6
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 3a5364dd - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdu
/dev/sdu:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 89efc0ab:8639052b:e5c44ef0:a3d3c085
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : b2411f5d - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdv
/dev/sdv:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : d6b55438:42171969:8450174e:e8a6dd4f
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : a4ce224a - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdw
/dev/sdw:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : f9499252:50d79458:f2662aa9:f25f1c3a
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : f3d945f4 - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdx
/dev/sdx:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : b6ce9001:c33349f9:4f1cab26:2a778d5d
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : e47df3ba - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdy
/dev/sdy:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : b7a71581:7b81c93c:df58b3a5:6773c94d
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 16c75342 - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdz
/dev/sdz:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 0065d0f6:97a47a2b:1733e172:74b59f40
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 3b374fed - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 6
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdaa
/dev/sdaa:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 809b7d03:0a06eaa1:6704d4a0:14621573
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 1ebc65d1 - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 7
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdab
/dev/sdab:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 4c899786:22b4da32:fd268ffe:f4117c6e
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 8be8d42c - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 8
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdac
/dev/sdac:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 8a21bc71:8db320f0:fff1e06b:c006555f
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 927e2ba4 - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 9
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdad
/dev/sdad:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 23ccc25a:e36a303a:d7a533c6:a330d5d2
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 93676b4f - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 10
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
[root@inscribe5 etc]# mdadm --examine /dev/sdae
/dev/sdae:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
Name : igmimager.ncl.ac.uk:136
Creation Time : Thu May 28 12:34:30 2015
Raid Level : raid5
Raid Devices : 12
Avail Dev Size : 7813775024 (3725.90 GiB 4000.65 GB)
Array Size : 42975758848 (40984.88 GiB 44007.18 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=688 sectors
State : clean
Device UUID : 0f3c30b6:c6adb547:f9a251ad:927a008f
Internal Bitmap : 8 sectors from superblock
Update Time : Fri May 20 13:17:33 2016
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 9fa36531 - correct
Events : 16085
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 11
Array State : AAAAAAAAAAAA ('A' == active, '.' == missing, 'R' == replacing)
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: mdadm remove old md details reassemble working drives
2016-05-26 9:56 mdadm remove old md details reassemble working drives Bryan Hepworth
@ 2016-05-26 11:41 ` Andreas Klauer
2016-05-26 14:21 ` Bryan Hepworth
0 siblings, 1 reply; 3+ messages in thread
From: Andreas Klauer @ 2016-05-26 11:41 UTC (permalink / raw)
To: Bryan Hepworth; +Cc: linux-raid@vger.kernel.org
On Thu, May 26, 2016 at 09:56:24AM +0000, Bryan Hepworth wrote:
> /etc/mdadm.conf
>
> [root@inscribe5 etc]# cat mdadm.conf
> ARRAY /dev/md/inscribe5.ncl.ac.uk:130 level=raid5 num-devices=12 metadata=1.2 name=inscribe5.ncl.ac.uk:130 UUID=cb850648:d5b35007:dc6000f0:b48ab578
> devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf,/dev/sdg,/dev/sdh,/dev/sdi,/dev/sdj,/dev/sdk,/dev/sdl,/dev/sdm
> ARRAY /dev/md/igmimager.ncl.ac.uk:136 level=raid5 num-devices=12 metadata=1.2 name=igmimager.ncl.ac.uk:136 UUID=b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
> devices=/dev/sdn,/dev/sdo,/dev/sdp,/dev/sdq,/dev/sdr,/dev/sds,/dev/sdt,/dev/sdu,/dev/sdv,/dev/sdw,/dev/sdx,/dev/sdy
That looks a bit overengineered...
You can reduce the mdadm.conf to just use UUID and nothing else
ARRAY /dev/md0 UUID=cb850648:d5b35007:dc6000f0:b48ab578
Keep the /dev/md/name if you need it but everything else
(num-devices, metadata, devices, level, ...) is part
of the metadata, no need to duplicate it in the conf.
There doesn't seem to be a problem with the metadata itself
(all clean, same update time, same event count) so unless
the devices get detected late or something it should just work
when assembling by UUID...
Regards
Andreas Klauer
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: mdadm remove old md details reassemble working drives
2016-05-26 11:41 ` Andreas Klauer
@ 2016-05-26 14:21 ` Bryan Hepworth
0 siblings, 0 replies; 3+ messages in thread
From: Bryan Hepworth @ 2016-05-26 14:21 UTC (permalink / raw)
To: Andreas Klauer; +Cc: linux-raid@vger.kernel.org
>-----Original Message-----
>From: Andreas Klauer [mailto:Andreas.Klauer@metamorpher.de]
>Sent: 26 May 2016 12:41
>To: Bryan Hepworth
>Cc: linux-raid@vger.kernel.org
>Subject: Re: mdadm remove old md details reassemble working drives
>
>On Thu, May 26, 2016 at 09:56:24AM +0000, Bryan Hepworth wrote:
>> /etc/mdadm.conf
>>
>> [root@inscribe5 etc]# cat mdadm.conf
>> ARRAY /dev/md/inscribe5.ncl.ac.uk:130 level=raid5 num-devices=12
>metadata=1.2 name=inscribe5.ncl.ac.uk:130
>UUID=cb850648:d5b35007:dc6000f0:b48ab578
>>
>devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf,/dev/sdg,/dev/sdh,
>/dev/sdi,/dev/sdj,/dev/sdk,/dev/sdl,/dev/sdm
>> ARRAY /dev/md/igmimager.ncl.ac.uk:136 level=raid5 num-devices=12
>metadata=1.2 name=igmimager.ncl.ac.uk:136
>UUID=b4cb3aaf:e09885cb:6c0ea8bf:a4118a61
>>
>devices=/dev/sdn,/dev/sdo,/dev/sdp,/dev/sdq,/dev/sdr,/dev/sds,/dev/sdt,
>/dev/sdu,/dev/sdv,/dev/sdw,/dev/sdx,/dev/sdy
>
>That looks a bit overengineered...
>
>You can reduce the mdadm.conf to just use UUID and nothing else
>
>ARRAY /dev/md0 UUID=cb850648:d5b35007:dc6000f0:b48ab578
>
>Keep the /dev/md/name if you need it but everything else
>(num-devices, metadata, devices, level, ...) is part
>of the metadata, no need to duplicate it in the conf.
>
>There doesn't seem to be a problem with the metadata itself
>(all clean, same update time, same event count) so unless
>the devices get detected late or something it should just work
>when assembling by UUID...
>
>Regards
>Andreas Klauer
Thanks Andreas
Works like a charm, back up and running thanks so much for your input.
Bryan
^ permalink raw reply [flat|nested] 3+ messages in thread
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