Virtual disk performance read/write latency

Hi there,

I'd like some assistance on interpreting the vCentre "virtual disk" statistics. Were running a faily busy SQL server VM and based on best practice the "avg disk sec/transfer" figures should be between 10 - 30ms or the latency of disk read/wrtie.

Now if I'm monitoring the stats from vCentre "vritual disk" it shows the read/write latency for:

scsi0:1

scsi0:2

scsi0:3

can anyone advise how I should interpret these or what figure I should expect the charts is showing between 4 - 40ms for transfer/read latency?

Many thanks......