[Nagiosplug-help] check_disk reporting odd information

[Israel Brewster]

I'm seeing something similar with the check_disk_smb plugin. I don't know for sure if it is related, but the result is the same- in my case it says "Disk ok - 2047.93G (53280%) free on \\otz-freenas\flight". It seems to me the problem is related to the disk being completely full. If I look at df on the machine in question, I get the following:

Filesystem    Size    Used   Avail Capacity  Mounted on
/dev/ad0s2    3.9G    3.8G   -309M   109%    /mnt/flight

notice the negative available space and greater than 100% capacity. Perhaps the check_disk and check_disk_smb plugins don't deal with negative numbers and greater than 100% properly, resulting in a rollover?


On Nov 10, 2010, at 9:56 AM, Christopher McCoy wrote:

> Hi All,
> 
> I'm monitoring a few NAS systems with Nagios via NRPE.
> 
> check_disk works as expected on two of the three machines, outputting the
> following information :
> 
> System 1:
> [/opt/libexec] # ./check_disk -w 20% -c 10% -p /share/MD0_DATA -q
> DISK CRITICAL - free space: /share/MD0_DATA 756618 MB (7%);|
> /share/MD0_DATA=10501093MB;9006168;10131939;0;11257711
> 
> 
> System 2:
> [/opt/libexec] # ./check_disk -w 20% -c 10% -p /share/MD0_DATA
> DISK OK - free space: /share/MD0_DATA 6879728 MB (61%);|
> /share/MD0_DATA=4377983MB;9006168;10131939;0;11257711
> 
> 
> System 3 however reports the following :
> [/opt/libexec] # ./check_disk -w 20% -c 10% -p /share/MD0_DATA
> DISK CRITICAL - free space: /share/MD0_DATA 72057594037927936 MB
> (640073169734%);| /share/MD0_DATA=18020894MB;9006168;10131939;0;11257711
> 
> 
> 
> All three systems are identical in both hardware and software
> configurations (core2duo, 2gb ram, 8x2tb drives in a SWR6).  Is there any
> reason why check_disk would output such incredibly incorrect information?
> 
> 
> 
> ---
> Chris McCoy
> Internal Systems Engineer
> Damballa, Inc.
> cmccoy at damballa.com
> Office: 404.961.7412
> Cell: 404.492.6137 (google voice)
> 
> 
> 
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-----------------------------------------------
Israel Brewster
Computer Support Technician II
Era Alaska
5245 Airport Industrial Rd
Fairbanks, AK 99709
(907) 450-7250 x7293
-----------------------------------------------

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