A typical vm(VmWare) on our network has two virtual disks; one for the OS and the other for storage. We currently run the OS vdk(c drive) from the local drives on the host server and the D drive is a vdk on the SAN. The SAN is a RAID 10 with 12 10K SAS drives and the host server is a RAID 10 with 8 10k SAS drives as well. We would like to create a new RAID set on the SAN with SSD drives and move the OS vdk to it. Would we get better performance if the SSD's were on the local host instead of the SAN? The SAN is connected using 1Gb iSCSI.
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