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Can APM monitor DISK LATENCY?

I have this question from one of our system admin:

Can SolarWinds monitor disk latency? We’ve been having latency issues with VMs housed on certain SAN LUNs. We would want to be able to see latency graphed when we drill down to a server in SolarWinds, just like CPU and memory are done. We would possibly like to set up notifications when latency surpasses a set threshold. Could this also be done at the ESX datastore level?

NOTE:

We also have Solarwinds Storage Manger (5.x) - does anyone know if that product can do this if Orion APM cannot????

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aLTeReGo

The best initial indicator of disk performance on a Windows host is obtained by using the “\Logical Disk(*)\Avg. sec/Read” and “\Logical Disk(*)\Avg. sec/Write” performance monitor counters. These performance monitor counters measure the amount of time that read and write operations take to respond to the operating system. As a general rule of thumb, average response times greater than 15ms are considered sub-optimal. This is based on the typical seek time of a single 7200 RPM disk drive without cache. The use of logical disk versus physical disk performance monitor counters is recommended because Windows applications and services utilize logical drives represented as drive letters wherein the physical disk (LUN) presented to the operating system can be comprised of multiple physical disk drives in a disk array. Use the following rule of thumb when measuring disk latency on the Windows host using the \Logical Disk(*)\Avg. Disk sec/Read or \Logical Disk(*)\Avg. Disk sec/Write performance monitor counters:

1ms to 15ms = Healthy
15ms to 25ms = Warning or Monitor
26ms or greater = Critical, performance will be adversely affected

lchance

That sounds good for Windows-based systems.

I'm going to pass this same question to the Storage Manager forum. I hope their OS 'agent' will provide some monitoring at this level also, most especially for LUNs and IOPs.

THANKS!