I'm running TSM v 4.1.3 on System\390.  My database is 47G and spread across 25 
physical volumes (gets a 78% cache hit / not so great).

One of my performance and tuning books recommends not spreading your database 
over more than 12 physical volumes.  Could anyone explain why?  What kind of 
performance/utilazation "hit" am I going to
incur by having my db spread across 25 volumes?

Regards,
Joe Wholey
TGA Distributed Data Services
Merrill Lynch
Phone: 212-647-3018
Page:  888-637-7450
E-mail: joseph_wholey AT ml DOT com