Raid configuration in new ESXi/Exchang machine
Posted on 2009-04-21
I am setting up a new Dell R710 with the following specs:
2x E5504 procs, 16gb Ram, 8x 146gb 10k SAS drives, ESXi.
It will be running the latest version of ESXi, and will host (at the outset) 2 VM. The first VM will be Server 2008 and Exchange 2007 for 20 users. The second VM will be either my web server (Server 2003 with Blackberry BES) or PGP Universal Server (WebMessenger). I was planning on giving Exchange 8gb of ram, and then 2gb to the webserver, leaving some for future growth of the server.
My question is this - what's the best RAID configuration for throughput. ESXi is embedded so the disks will be just for the VM's. Should I do one of the following:
Raid 1+0 (I think this will give me ~296gb of storage), but no separation of OS and databases
Raid 1 (2 disks) for OS, Raid 5 (5 disks) for databases, 1 hot spare
Raid 5 with 1 or 2 hot spares
Or something completely different?
Thanks for the help!