Help Please

It's been awhile since I have setup a TSM server for Windows (Tivoli Storage 
Manager Enterprise Addition 5.4). I am trying to find out what the optimum 
number of volumes I should define for each primary disk storage pool.

I have a disk array that I broke into 3 Raid 5 groups; one group for Daily 
backups, one for SQL backups, and one for Archives.  I also have a Raid 1 group 
defined for my DB backups and Log files.

The Raid 5 groups consist of three 300GB SAS drives each.  What size and how 
many volumes should I create for each Raid 5 group?

For the DB and Log files I have a 270GB Raid 1 group.  My database is currently 
around 40GB. What size should I make the DB and Log pools, and how many volumes 
should each have?

Thanks so much

Dean