I'm hoping someone can help me out with this. SolarWinds SAM is under-reporting all of my disk usage on several servers that I have checked so far. Any ideas? Has anybody else run into this?
What is the OS of the Systems? Are they being monitored via SNMP, WMI, or the Solarwinds Agents?
For all Solarwinds Drives, we display all Drives in 1024MB =1GB. This will look different in some Operating Systems, like Linux, where they use 1000 instead of 1024.
Hi Sean,
Thanks for getting back to me. They're RHEL 5 and 6 systems monitored via SNMP. The 1000MB versus 1024MB drive difference may explain it. Let me check with one of my Linux guys and see what they say.
If this is indeed the case, is there a way to adjust SolarWinds to compensate that you know of?
Sorry it took me so long to get back to you. I was out for the holidays. I checked with our Linux guy and this is not the case. Linux (at least our systems) report the disk usage in the same manner as SolarWinds. But we can confirm that at least 5-10 Linux servers are showing this problem. It is most likely an issue with most/all of them, but we would have to manually check about 400 servers to confirm. Any other ideas?
Is the difference between SolarWinds and the OS in the 3-7% range? Then I'm guessing you're running up against the issue outlined in this Thwack thread: Re: Linux Drive Monitors not Accounting for Reserved Space
TL;DR - net-snmp counts reserved space as "free" space and therefore will under report disk utilization. We manage this on my team by setting the alert threshold 5% lower for nodes with a Vendor like 'net-snmp'.
