On Thursday 11 March 2010, you wrote:
> Say there is not disk storage pool and two clients from the two tape
> storage pools accidentally sent their backups exactly at the same time.
> Which one graps the tape drive first?
The first one.  There is aways 1 that will the first.
A restore will cancel a lower process like reclamation or migratition to free
up a tape drive.

You _can_ have a dead lock on tape drives where 1 process is waiting for a
tape in use by an other process and vice versa.  I have seen this on older TSM
server software ( <5.x.x).


Stef