hi,

Try using 'filesperset' option in your backup script.

regards,
Thiha


>        I use tdp for oracle 2.2 on a tsm4.2 server
>        I allocate 2 channels for the rman backup, t1 and t2
>        when the backup starts, it initially starts to write to 2 tapes.
>        After a short while, one drive goes idle and the other tape
>        continually gets written to, till completion of the backup.

>        Anyone have any idea as to what is causing one the tapes to go
>        idle?

>        The backup files aren't very big.
>        channels t1 and t2 continue to get 'allocated' to completion if
the
>job.
>        The mountretention on the devc is big.
>        what else could I check?