Similar issue

Did this issue ever get resolved or worked on?  We have what appears to be a similar issue.  I have (3) Dell R620's with Dual port 10GB cards connected to (2) Dell 8024 10GB switches.  They are all running VMware 5.5.  The MD3620i is dual controller, all (4) 10GB NICS are connected.  The MD3620 has 20 1.2TB 10K drives configured in a drive pool.  When the one of the controllers in the MD3620i failed on Wednesday, all the virtual servers continued to function, but we had major problems with disk latency on one I/O intensive virtual guest.  As soon as we replaced the failed controller, the issue went away.  From the Disk performance monitor in MDSM, we never see more than about 250MB/s and 3000 IOPS on the array in total, so this should easily be handled by a single controller.

I would appreciate some kind of response here, as there does not seem to have been anything posted on the board.