I would like to have RAID status monitored by nagios.
This sounds like a simple script, but I'm not sure what approach is correct.
Considering, that the "health" status of /proc/mdstat looks like this:
# cat /proc/mdstat
Personalities : [raid1] [raid10]
md2 : active raid10 sda2[4] sdd2[3] sdc2[2] sdb2[1]
779264640 blocks super 1.0 64K chunks 2 near-copies [4/4] [UUUU]
md1 : active raid1 sdd1[1] sdc1[0]
1076224 blocks [2/2] [UU]
md0 : active raid1 sdb1[1] sda1[0]
1076224 blocks [2/2] [UU]
unused devices: <none>
What my script should be checking?
Does the number of "U" (8 for this host) letters indicate that RAID is
healthy?
Or should I count "in_sync" in "cat /sys/block/md*/md/rd*/state"?
Perhaps the two approaches are the same, though.
What's the best way to determine that the RAID is running fine?
--
Tomasz Chmielewski
http://wpkg.org
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