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Old 01-30-2012, 09:35 PM   #1
depam
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Registered: Sep 2005
Posts: 833

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RAID is clean but degraded and PV is removed


Hi,

From the mdadm, I can see that the RAID 1 array has been degraded. I don't see any I/O error but want to make sure how to check what went wrong and why the PV has been taken out of the array.

Personalities : [raid0] [raid1]
md1 : active raid1 sdb2[1]
1052160 blocks [2/1] [_U]

md2 : active raid1 sdb3[1]
972558912 blocks [2/1] [_U]

md0 : active raid1 sdb1[1]
3148672 blocks [2/1] [_U]

for i in 0 1 2
> do
> mdadm --detail /dev/md$i
> done
/dev/md0:
Version : 00.90.03
Creation Time : Sat Sep 19 08:55:46 2009
Raid Level : raid1
Array Size : 3148672 (3.00 GiB 3.22 GB)
Device Size : 3148672 (3.00 GiB 3.22 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Persistence : Superblock is persistent

Update Time : Tue Jan 31 10:34:57 2012
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0

UUID : dcd17830:a7a0df2c:b59cf9e7:d50d7e75
Events : 0.4012464

Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 17 1 active sync /dev/sdb1
/dev/md1:
Version : 00.90.03
Creation Time : Sat Sep 19 08:55:46 2009
Raid Level : raid1
Array Size : 1052160 (1027.67 MiB 1077.41 MB)
Device Size : 1052160 (1027.67 MiB 1077.41 MB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 1
Persistence : Superblock is persistent

Update Time : Tue Jan 31 09:11:51 2012
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0

UUID : 029472d5:76f43636:de79199e:6774b113
Events : 0.124

Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 18 1 active sync /dev/sdb2
/dev/md2:
Version : 00.90.03
Creation Time : Sat Sep 19 08:55:47 2009
Raid Level : raid1
Array Size : 972558912 (927.50 GiB 995.90 GB)
Device Size : 972558912 (927.50 GiB 995.90 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 2
Persistence : Superblock is persistent

Update Time : Tue Jan 31 10:35:00 2012
State : active, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0

UUID : 1f80a5a4:f0bc4d78:b9f3ccf2:e0fd8227
Events : 0.5314183

Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 19 1 active sync /dev/sdb3
 
  


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