I have a raid setup from which I physically removed a hard drive.
The array has three good active physical devices.
The output from mdadm shows "Raid Devices : 4" and "Total Devices : 3"
My objective is to removed all indications of the removed device. Note that
the removed drive has no device name associated with it, so I cannot
remove it with mdadm.
Is it as simple as editing the /etc/mdadm.conf to "num-devices=3"? Would
that change the "State : clean, degraded " to just clean?
Is there something else that needs to be done to do this correctly?
Here's what the config looks like at the moment:
# mdadm -D /dev/md0
/dev/md0:
Version : 0.90
Creation Time : Fri Jul 10 02:39:32 2009
Raid Level : raid1
Array Size : 24000 (23.44 MiB 24.58 MB)
Used Dev Size : 24000 (23.44 MiB 24.58 MB)
Raid Devices : 4
Total Devices : 3
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Jul 23 04:18:18 2009
State : clean, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
UUID : fafe2b90:7ae3cb68:2011742e:3cbab095 (local to host xxxxxxxxxx)
Events : 0.82
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
2 8 8 2 active sync /dev/sda8
3 0 0 3 removed
# mdadm --detail --scan
ARRAY /dev/md0 level=raid1 num-devices=4 metadata=0.90
UUID=fafe2b90:7ae3cb68:2011742e:3cbab095
any thoughts appreciated,
~af
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