Q:

Vsphere san disk best practice

i have a HP EVA 4000 SAN
now, what do you suggest in performance view. 
should i cut two 500GB raid 5 disks in the EVA and the do a disk expand in vsphere
or i wont see any perfromance improvements? 
thanks for you great tips

A:

When you extend a datastore the LUNs are merely concatenated rather than stripped so you get no performance improvement.