db vols and disk pools

[David DeCuir]

I have sixteen 18gb SSA disks (one adapter, two loops, one 7133-D40 shelf).
I've estimated I'll need a 36gb database and a 4gb recovery log. The rest
of the
storage will be divided into two disk pools. My question is:
How to setup physical disk wise?
Should I keep the db on four 18gb disks (includes mirrors) and the disk
pools on
their own disks. Or should I spread out the db on more disks and share
those disks
with the disk pools. Which has less contention? looking for advice. Thanks.