In my mind TSM make "load balancing" when it have different volumes. I'm
pretty sure of that with disk storage pool. I don't know for DB Volume. So,
for me you should create on volume by physical disk to avoid disk
contention.

Salutations / Best Regards 
g            GE Medical Systems 
___________________________________________ 
Eric Boireau                               Global Systems 
Server Architect / Technology & Infrastructure Team

GE Medical Systems S.A 
283, rue de la Minière 
78533 BUC Cedex France 
Tél: (33) 1 30 70 39 32,  DC: 8*644 3932 
Fax: (33) 1 30 70 39 30, DC: 8*644 3930 
mailto:Eric.Boireau AT med.ge DOT com