Good Afternoon.
I was asked to setup a new TSM server 5.2.2 on a AIX 5.2 server.
My question has to do with setting up the DB, LOG and DISKPOOL.
On our current servers which run the same O/S and TSM version the DB, LOG and 
DISKPOOL are mirrored.
On the new system I'm setting up these are all going to reside on a IBM 
SAN(SHARK) which is all RAID.
Is there any reason to mirror them since the mirror would be on the same set of 
drives(space was already allocated on a LUN)?
I understand it's always good to mirror(protect DB, LOG, DISKPOOL) but in this 
case I'd have to mirror to the same set of disk since I was only allocated a 
set of space to work.  In the TSM class it also recommended that you mirror for 
protection.
I'm in the middle of reading the "Quick Start" for the second time and I see 
they recommend "Mirror your Database and recovery log for "Server and storage 
pool protection".  I wanted to make sure there was not a performance issue or 
anything else.

Have a Great Day,
Eric Jones
> *  eric.j.jones AT lmco DOT com
> *:   607-751-4133
Cell : 607-972-7621