Dear MKGUYthanks for the info. ESXI hpsa version is 5.5.0.58-1OEM.550.0.0.1331820. but p420i firmware is 4.68.we have run with this firmware without any issue. i analysed IOPS usage with Dell Foglight (vKernel) there no huge IOPS usage on VMs. Data store latency shows as follows.
there are 8 power on VMs on this data store.
Thanks & Regards,
Lasantha.