Unlike the full ESX installation, you cannot install the HP Array Configuration Utility on ESXi. You will need to boot the system with SmartStart in order to configure arrays (or set up the arrays from the limited RBSU utility.)
Thanks! Ok, so that does answer my question i guess. So if i make the array's / disk sets then i can access them as 1 disk right? And then i can configure the VMware machines right?
Yes and no... you'll probably want your 72GB 15k disks in their own Array, and the 146GB 10k disks in another. If you put them all together, you'll get 4x72GB raw (and either 3x72GB or 2x72GB usable, depending on which RAID option you choose), and possibly some odd performance figures due to mixing 10k and 15k disks.
My recommendation would thus be:
Array A: 2x 72GB 15k
Array B: 2x 146GB 10k
Create one logical drive on each of these arrays, using RAID1.
Thanks! That's it.. now all my questions are answerd. I'm ready to test the situation.