> Maybe start out with 'mdadm -D' on everything... literally everything,
> every whole drive (i.e. /dev/sdd, /dev/sdc, all of them) and also
> everyone of their partitions; and see if it's possible to sort out
> this mess.
[root@lamachine ~]# mdadm -D /dev/md*
/dev/md126:
Version : 0.90
Creation Time : Thu Dec 3 22:12:12 2009
Raid Level : raid10
Array Size : 30719936 (29.30 GiB 31.46 GB)
Used Dev Size : 30719936 (29.30 GiB 31.46 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 126
Persistence : Superblock is persistent
Update Time : Tue Sep 13 21:33:13 2016
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Layout : near=2
Chunk Size : 64K
UUID : 9af006ca:8845bbd3:bfe78010:bc810f04
Events : 0.264152
Number Major Minor RaidDevice State
0 8 82 0 active sync set-A /dev/sdf2
1 8 1 1 active sync set-B /dev/sda1
/dev/md127:
Version : 1.2
Creation Time : Tue Jul 26 19:00:28 2011
Raid Level : raid0
Array Size : 94367232 (90.00 GiB 96.63 GB)
Raid Devices : 3
Total Devices : 3
Persistence : Superblock is persistent
Update Time : Tue Jul 26 19:00:28 2011
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Chunk Size : 512K
Name : reading.homeunix.com:3
UUID : acd5374f:72628c93:6a906c4b:5f675ce5
Events : 0
Number Major Minor RaidDevice State
0 8 85 0 active sync /dev/sdf5
1 8 21 1 active sync /dev/sdb5
2 8 5 2 active sync /dev/sda5
/dev/md128:
Version : 1.2
Raid Level : raid0
Total Devices : 1
Persistence : Superblock is persistent
State : inactive
Name : lamachine:128 (local to host lamachine)
UUID : f2372cb9:d3816fd6:ce86d826:882ec82e
Events : 4154
Number Major Minor RaidDevice
- 8 49 - /dev/sdd1
/dev/md129:
Version : 1.2
Raid Level : raid0
Total Devices : 1
Persistence : Superblock is persistent
State : inactive
Name : lamachine:129 (local to host lamachine)
UUID : 895dae98:d1a496de:4f590b8b:cb8ac12a
Events : 0
Number Major Minor RaidDevice
- 8 50 - /dev/sdd2
/dev/md2:
Version : 0.90
Creation Time : Mon Feb 11 07:54:36 2013
Raid Level : raid5
Array Size : 511999872 (488.28 GiB 524.29 GB)
Used Dev Size : 255999936 (244.14 GiB 262.14 GB)
Raid Devices : 3
Total Devices : 3
Preferred Minor : 2
Persistence : Superblock is persistent
Update Time : Tue Sep 13 20:29:02 2016
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
UUID : 2cff15d1:e411447b:fd5d4721:03e44022 (local to host lamachine)
Events : 0.611
Number Major Minor RaidDevice State
0 8 83 0 active sync /dev/sdf3
1 8 18 1 active sync /dev/sdb2
2 8 2 2 active sync /dev/sda2
[root@lamachine ~]# mdadm -D /dev/sd*
mdadm: /dev/sda does not appear to be an md device
mdadm: /dev/sda1 does not appear to be an md device
mdadm: /dev/sda2 does not appear to be an md device
mdadm: /dev/sda3 does not appear to be an md device
mdadm: /dev/sda5 does not appear to be an md device
mdadm: /dev/sda6 does not appear to be an md device
mdadm: /dev/sdb does not appear to be an md device
mdadm: /dev/sdb2 does not appear to be an md device
mdadm: /dev/sdb3 does not appear to be an md device
mdadm: /dev/sdb4 does not appear to be an md device
mdadm: /dev/sdb5 does not appear to be an md device
mdadm: /dev/sdb6 does not appear to be an md device
mdadm: /dev/sdc does not appear to be an md device
mdadm: /dev/sdd does not appear to be an md device
mdadm: /dev/sdd1 does not appear to be an md device
mdadm: /dev/sdd2 does not appear to be an md device
mdadm: /dev/sde does not appear to be an md device
mdadm: /dev/sdf does not appear to be an md device
mdadm: /dev/sdf1 does not appear to be an md device
mdadm: /dev/sdf2 does not appear to be an md device
mdadm: /dev/sdf3 does not appear to be an md device
mdadm: /dev/sdf4 does not appear to be an md device
mdadm: /dev/sdf5 does not appear to be an md device
mdadm: /dev/sdf6 does not appear to be an md device
[root@lamachine ~]#
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