We recently ran the Dell Performance Analysis Collection kit which monitors your servers via WMI for 24 hours. You send the file off to Dell and they return a report with graphs of IOPS and MB/S disk usage.
This uncovered some interesting stats for us which we'd like to look further into. This is just a sales tool for Dell, but is there a similar tool that we can download/purchase for use that generates our own reports? Even better would be ot tell us what processes are using the IO.
I've never seen Dell do this, but maybe it was something like PAL. There's also Windows Performance Monitor and Perfmon, both are free. I was going to also mention IOMeter but it doesn't sound like you want to generate your own load.
DPACK is free and available at http://support.dell.com Then search for dpack for the latest update
This is a service carried over from their purchase of compellent (imo the best SAN solution in the market)
It is a very good tool, actually I am in contact with my Dell account manager about how to get it... Some briev overview is here:
http://content.dell.com/uk/en/business/d/business~smb~sb360~en/Documents~DPACK-overview.pdf.aspx