I'm trying to test the status of a raid device using mdadm:
# mdadm --misc --detail --test /dev/md0
However this does not appear to work as documented. As I read the man
page, the return code is supposed to reflect the status of the raid
device:
"
MISC MODE
...
--detail
The device should be an active md device. mdadm will
display a detailed description of the array. --brief or --scan
will cause the output to be less detailed and the format to be
suitable for inclusion in /etc/mdadm.conf. The exit status
of mdadm will normally be 0 unless mdadm failed to get useful
information about the device(s). However if the --test option
is given, then the exit status will be:
0 The array is functioning normally.
1 The array has at least one failed device.
2 The array has multiple failed devices and hence is
unusable (raid4 or raid5).
4 There was an error while trying to get information about
the device.
"
Am I missing something here (see below)?
Thanks,
Russ
------------------------------------------------------------------------
# mdadm --misc --detail --test /dev/md0; echo -e "\nReturned --> $?"
/dev/md0:
Version : 00.90.03
Creation Time : Mon Aug 23 12:49:46 2004
Raid Level : raid1
Array Size : 104320 (101.89 MiB 106.82 MB)
Device Size : 104320 (101.89 MiB 106.82 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Nov 16 13:38:40 2006
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : 403240c4:4a5c7f60:ce59447e:a08858a9
Events : 0.4476
Number Major Minor RaidDevice State
0 33 1 0 active sync /dev/hde1
1 34 1 1 active sync /dev/hdg1
Returned --> 0
# mdadm --manage --fail /dev/md0 /dev/hdg1
mdadm: set /dev/hdg1 faulty in /dev/md0
# mdadm --misc --detail --test /dev/md0; echo -e "\nReturned --> $?"
/dev/md0:
Version : 00.90.03
Creation Time : Mon Aug 23 12:49:46 2004
Raid Level : raid1
Array Size : 104320 (101.89 MiB 106.82 MB)
Device Size : 104320 (101.89 MiB 106.82 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Fri Nov 17 14:08:33 2006
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 1
Spare Devices : 0
UUID : 403240c4:4a5c7f60:ce59447e:a08858a9
Events : 0.4478
Number Major Minor RaidDevice State
0 33 1 0 active sync /dev/hde1
1 0 0 1 removed
2 34 1 - faulty spare /dev/hdg1
Returned --> 0
# mdadm --manage --remove /dev/md0 /dev/hdg1
mdadm: hot removed /dev/hdg1
# mdadm --misc --detail --test /dev/md0; echo -e "\nReturned --> $?"
/dev/md0:
Version : 00.90.03
Creation Time : Mon Aug 23 12:49:46 2004
Raid Level : raid1
Array Size : 104320 (101.89 MiB 106.82 MB)
Device Size : 104320 (101.89 MiB 106.82 MB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Fri Nov 17 14:09:02 2006
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
UUID : 403240c4:4a5c7f60:ce59447e:a08858a9
Events : 0.4480
Number Major Minor RaidDevice State
0 33 1 0 active sync /dev/hde1
1 0 0 1 removed
Returned --> 0
-----------------------------------------------------------------------------------------
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