I'm setting up a file system for /usr/openv using volume manager with
four disks, and I'm wondering if it would be better to make it a raid5
system, or a concatenated mirror.  If I use mirroring, then my disk
space is limited to that of the two disks, but with raid5, I get an
extra disk space.  For performance reasons, what would be the best
layout of disks?

thanks
robert