From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Hardy <mhardy@h3c.com>
Subject: Re: checking state of RAID (for automated notifications)
Date: Wed, 06 Sep 2006 09:50:13 -0700
Message-ID: <44FEFC45.1080500@h3c.com>
References: <44FE8A68.8060306@wpkg.org>
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To: Tomasz Chmielewski <mangoo@wpkg.org>
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<berlin> % rpm -qf /usr/lib/nagios/plugins/contrib/check_linux_raid.pl
nagios-plugins-1.4.1-1.2.fc4.rf

It is built in to my nagios plugins package at least, and works great.

-Mike

Tomasz Chmielewski wrote:
> 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?
> 
>