root@debian:~# mdadm -D /dev/md0
/dev/md0:
Version : 0.90
Creation Time : Sat Dec 25 15:47:45 2010
Raid Level : raid1
Array Size : 14651136 (13.97 GiB 15.00 GB)
Used Dev Size : 14651136 (13.97 GiB 15.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Wed Jun 13 14:28:39 2012
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : 6c35c49e:290e6d2a:7c9f3a92:ca03106f
Events : 0.56822
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
root@debian:~# mdadm -E /dev/sda1
/dev/sda1:
Magic : a92b4efc
Version : 0.90.00
UUID : 6c35c49e:290e6d2a:7c9f3a92:ca03106f
Creation Time : Sat Dec 25 15:47:45 2010
Raid Level : raid1
Used Dev Size : 14651136 (13.97 GiB 15.00 GB)
Array Size : 14651136 (13.97 GiB 15.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Wed Jun 13 14:29:04 2012
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : 22e1bf18 - correct
Events : 56822
Number Major Minor RaidDevice State
this 0 8 1 0 active sync /dev/sda1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
root@debian:~# mdadm -E /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 0.90.00
UUID : 6c35c49e:290e6d2a:7c9f3a92:ca03106f
Creation Time : Sat Dec 25 15:47:45 2010
Raid Level : raid1
Used Dev Size : 14651136 (13.97 GiB 15.00 GB)
Array Size : 14651136 (13.97 GiB 15.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Wed Jun 13 14:29:04 2012
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : 22e1bf2a - correct
Events : 56822
Number Major Minor RaidDevice State
this 1 8 17 1 active sync /dev/sdb1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
root@debian:~# mdadm -D /dev/md0
/dev/md0:
Version : 0.90
Creation Time : Sat Dec 25 15:47:45 2010
Raid Level : raid1
Array Size : 14651136 (13.97 GiB 15.00 GB)
Used Dev Size : 14651136 (13.97 GiB 15.00 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Jun 14 13:59:55 2012
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
UUID : 6c35c49e:290e6d2a:7c9f3a92:ca03106f
Events : 0.67804
Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 1 1 active sync /dev/sda1
root@debian:~# mdadm -E /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 0.90.00
UUID : 6c35c49e:290e6d2a:7c9f3a92:ca03106f
Creation Time : Sat Dec 25 15:47:45 2010
Raid Level : raid1
Used Dev Size : 14651136 (13.97 GiB 15.00 GB)
Array Size : 14651136 (13.97 GiB 15.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Update Time : Wed Jun 13 14:32:01 2012
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Checksum : 22e1bfc9 - correct
Events : 56822
Number Major Minor RaidDevice State
this 0 8 1 0 active sync /dev/sda1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
root@debian:~# mdadm -E /dev/sda1
/dev/sda1:
Magic : a92b4efc
Version : 0.90.00
UUID : 6c35c49e:290e6d2a:7c9f3a92:ca03106f
Creation Time : Sat Dec 25 15:47:45 2010
Raid Level : raid1
Used Dev Size : 14651136 (13.97 GiB 15.00 GB)
Array Size : 14651136 (13.97 GiB 15.00 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Update Time : Thu Jun 14 14:00:02 2012
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Checksum : 22e35f86 - correct
Events : 67808
Number Major Minor RaidDevice State
this 1 8 1 1 active sync /dev/sda1
0 0 0 0 0 removed
1 1 8 1 1 active sync /dev/sda1
#mdstat:
root@debian:~# cat /proc/mdstat
Personalities : [raid0] [raid1]
md2 : inactive sda4[1]
277931008 blocks super 1.2
md1 : active raid1 sda2[1]
489856 blocks [2/1] [_U]
md0 : active raid1 sda1[1]
14651136 blocks [2/1] [_U]
unused devices: <none>
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