[Nagiosplug-devel] [ nagiosplug-Patches-1338298 ] check_linux_raid plugin does not recognize recovery

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Tue May 10 21:39:52 CEST 2011

Patches item #1338298, was opened at 2005-10-26 12:09
Message generated for change (Comment added) made by cyco_dd
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Category: Bugfix
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Bastiaan Bakker (bastiaan)
Assigned to: Nobody/Anonymous (nobody)
Summary: check_linux_raid plugin does not recognize recovery

Initial Comment:
The check_linux_raid plugin does not properly parse
/proc/mdstat, causing it to report CRITICAL status for
RAID devices that are already recovering. For example
it reports CRITICAL for the following /proc/mdstat
(taken from a CentOS 3.5 box):

Personalities : [raid1]
read_ahead 1024 sectors
Event: 8
md0 : active raid1 sdb1[2] sda1[1]
      2097024 blocks [2/1] [_U]
      [>....................]  recovery =  0.4%
(10168/2097024) finish=23.8min speed=1452K/sec
unused devices: <none>

The attached patch fixes two bugs which cause this problem:
1) do not stop parsing after [_U] but until the next
mdX entry begins, so we won't miss the 'recovery line'
2) allow two or more spaces after 'recovery ='  in
order to recognize single digit percentages

Other modifications:
1) Addition of 'speed=' to the output:
WARNING md0 status=[_U], recovery=0.4%, finish=23.8min,
2) Addition of optionally specification of mdstat file
as second command line parameter. Primarily useful for


Comment By: Jan Wagner (cyco_dd)
Date: 2011-05-10 21:39

Maybe cause there is a unified patch missing?


Comment By: David Precious (bigpresh)
Date: 2011-05-10 15:51

Seemingly, this bug is still present, over five years after someone took
the time to provide a patch to fix it?  Seriously?


Comment By: Marek Grzybowski (wolodyj)
Date: 2007-08-29 13:34

Logged In: YES 
Originator: NO

why in 	nagios-plugins-1.4.9.tar.gz check_linux_raid still have this bug

u can use my patch, it is simply one line, but i prefer bastiaan plugin:

tombo at mg:/tmp/nagios-plugins-1.4.9/contrib$ diff -u
check_linux_raid.pl.orginal  check_linux_raid.pl
--- check_linux_raid.pl.orginal 2007-08-29 13:10:36.000000000 +0200
+++ check_linux_raid.pl 2007-08-29 13:10:51.000000000 +0200
@@ -64,6 +64,7 @@
                        } elsif (/recovery = (.*?)\s/) {
                                $recovery{$device} = $1;
                                ($finish{$device}) = /finish=(.*?min)/;
+                               $device=undef;
                        } elsif (/^\s*$/) {


Comment By: Bastiaan Bakker (bastiaan)
Date: 2005-10-31 14:54

Logged In: YES 

replaced diff with new version:
* fixes output so that nrpe understands it.
* implements --help and --version command line params.


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