I use LVM on top of RAID5, but it is _very_ convenient to be able to slice the enormous disks
in many parts.
I sliced my 4 disks in 14 partitions each, making thus 14 RAID5 volumes. I can now assign
those PVs to whatever VGs I am using. It is extremely flexible.
the *only* problem I encounter is that 14 partitions is not enough: 400Go/14partitions*(4-1
RAID disks)=85 Go. I would rather have had a 20Go unit.