I am looking at this entry level SAN
HP P2000 G3 MSA
We are probably going to be looking for two types of drives, which we feel will require 1 hot spare for each type. This leaves us with 10 drives.
We are considering 5 drives in 1TB 7.2K drives. This leaves us with 4TB of slow disks useable for storage.
We are unsure about the best configuration for the remaining dives. A RAID 5 array would work for all 5 drives. A RAID 10 array would leave one odd drive out.
Another possibility would be a 3 DISK RAID 5 array, and a mirrored set. I am not sure if RAID 1 is as fast or faster than RAID10
So the scenarios I see for drive configuration would be this:
10 disks 2 hot spares
(5Dx RAID5 x 7200)+(5D x RAID5 x 15K) - 4TB slow/3TB
(5Dx RAID5 x 7200)+ (3D x RAID5 x 15K)+(2D x RAID1 x 15K) -4TB slow/1.2TB/600GB
(4Dx RAID5 x 7200)+ (6D x RAID10 x 15K) -3TB slow/1.8TB
With a mind for virtual machines, and performance is it better to have the 3 separate RAID arrays for “segmenting” disk utilization? Am I over concerned about say 7 or 8 VMs running on the same disk subsets, if we were only to have two different RAID volumes, be it RAID 5 or 10?
The 7200 space will only be for storage and some file shares.
Just looking for some opinoins on storage configurations, from those who are actively supporting VMs in a production environment.