There is a round about way of doing this. Fran and I came up with it about 4 years ago.
VMBACKUP can backup to DASD. With that, you need to specify the size of a "tape" file that will exist on disk. Then, you do, in my case, a twin backup specifying a disk file and tape. When the disk file is full, it will start a new disk and a new tape file. I do believe there is a "triple" option of running a backup against 3 output devices. So this may help with a twin. Anyway, if you are running twin backups from VMBACKUP both copies will be the same size as the smallest media. You shouldn't have a problem there. Tom Duerbusch THD Consulting Law of Cat Acceleration A cat will accelerate at a constant rate, until he gets good and ready to stop. >>> Mark Wheeler <[EMAIL PROTECTED]> 6/6/2008 8:50 AM >>> > > Curiousity question, because I don't know VM:Backup, is there a way to > tell VM:Backup to only use n% of a tape? Our z/OS backup utility can be > told to do this. If this is possible, then you could fill a tape up to, > say, 80% and be fairly confident that the second tape would be long > enough to hold that data. Not that I'm aware of. Mark Wheeler
