Drive Matching for Mirroring [RAID 1] in Ultimate x64

gang I'm thinking of just using one of my win7 ultimate licenses for a protected server on my LAN.
I have a very fast 640gb barracuda drive from a few years back I want to use and thought I would try to match it up with one off ebay or somewhere if i can. my question is whether the exact sub-model must match? there were several iterations of these that have the same primary ID but different sub-models and I'm not real sure of the distinction other than channel... maybe firmware though.
will it work ok?

Golden said:

Hi,

Exact model matches are not important. Its more important to use disks of equal capacity and speed to get the most optimal performance from a RAID1 array.

hi there G!
thanks for the help again. I'll run with it.