Bump...
I was wondering this same thing. If they are there, they're hidden very well. I found the OnCommand Performance Manager and installed that a few days ago, thinking that's where they were hidden...nope. While OPM does some cool things, it doesn't give you the info you're looking for often.
Sure, you can get to a volume IOPS/response time graph...if you search for the volume name in OPM. This is very unintuitive, there is no "browse" option - so you have to know the volume name and type it in the search box. Why can't you get to this from OCUM? Also, you can't see anything higher than a volume, so you can't get a stacked graph of "these are the busiest volumes by order of IOPS". Basically, its pretty useless for troubleshooting.
For example, one of my SQL cluster instances decided to suck a whole ton of IOPS due to a software issue, which was killing the storage system...causing B2B CPs and severely impacting other workloads. Without this per-volume IOPS chart, it would have been very difficult to narrow down. Luckily, this system is still on 7-Mode.


However, it appears that OCUM is substantially inferior to DFM/OC5...There are no real-time CPU charts, IOPS charts (per protocol or per volume), no throughput charts, no disk busy charts, etc.

Unless I'm doing something wrong...