Usually, I build raid10 for VPS nodes. Now, I will use SAN, so all VPS will be created in SAN. With the host server, I assume that I don't need fast disk array, because all the disk requests have been processed in SAN already?
We were running ESX Vmware in a similar config - We've noticed that putting ESX on high speed drives (locally on the server, 15K RAID1) helped a lot. I think ESX creates temporary files "locally" - and that makes difference.
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