Well, its very likely that you are overloading the RG....

the rg i have is 14disk on 1 enclosure. raid5. all sata1 disks 500gb.

its a 6.5TB rg with 14luns on it.

is there  away to check performance on the whole rg?

the vsi does not show any stats on read and write latency. why is that/

Navisphere Analyser should be able to help you. You can check the performance of RAID Groups as well as individual LUN's (and SPs, ports, whatever you'd like to see in such a tool)

just shows this

Right mouse click the array ->properties -> Software

Is it listed?

There are a few important points to note here:

1) VSI will show only show latency values for RAID group LUNs, but not pool LUNs.  For pool LUNs, %Busy is shown instead.  So are you certain that you are working with an RG and not a pool?

2) There are known problems with VMware's disk latency alarm.  Please take a look at these:

http://communities.vmware.com/thread/331651

http://communities.vmware.com/message/1513613

You may in fact find that nothing is wrong, but the alarm is incorrectly triggering.

Lee

I agree with RRR, use analyser to determine if the array has latency and work outwords from there.  It could be an issue somewhere else in the I/O path or in VMware.

right clicking on the SP in navisphere and going to navisphere analyzer its grayed out .does that mean I dont have it installed?

how do i install analyzer onto the array?