Nagios Support Forum

Hello

trying to monitor large windows disk, but at some point check start giving funny results like:
F:\\ Label:DATA3 Serial Number 8ad353da: -51%used(14688637MB/-28959874MB) (<90%) : OK
Using check_snmp_storage.pl check, any ideas what other checks to use/try?

Thank you.

This is not an issue with the plugin itself, but mostly with SNMP. There are multiple reports online about issues with monitoring large drives via SNMP (negative data return). The hrStorageSize and hrStorageUsed values are reported as 32-bit signed Integers, which imposes some limitations, that vary based on the size of the allocation units. What is the size of your hard drive? Is it 28TB?

I am not sure if the SNMP issue will be fixed any time soon, so I would recommend trying something else, for example NCPA:
https://www.nagios.org/ncpa/

If you don't want to install an agent, you could try using WMI as this is a Windows machine. NCPA is a pretty light weight agent, and it is developed/maintained by us (Nagios), so I would recommend that you try this first.