several years ago (4?) I was working on TSM on Solaris, and working for a VAR we did some testing. Putting TSM files (everything) on a raw JBOD was significantly faster than using a big raid array.
for customers, we did use (in the old days, online disk suite) and a white paper from Sun, to use 4 disks to make a set of 4 bootable disks (two mirrored, two set up some other way, I don't remember any more, and we used the other 20+ disks in this solaris box for the database / journal / pool(s). We did the software off of the boot drives, and everything else was handled by TSM. We were setting up a duplicate system at a sister data center to do remote database backup to when I was pulled off the project for other efforts. Neat gig though!
