At 15:49 -0400 on 04/16/2009, O'Brien, David W. (NIH/CIT) [C] wrote
about Re: DFHSM MAXBACKUPTASKS(1) using 2 drives:
Er Jay, We're talking about tape drives here.
1 Backup Task should have 1 DASD unit as input and 1 Tape unit as output.
The OP specified Duplexing was turned off.
Dave O'Brien
NIH Contractor
I think there is some confusion.
MAXBACKUPTASKS(1) means start 1 task.
DUPLEX BACKUP(N) means create only 1 Backup Dataset (ie: One DD).
DUPLEX BACKUP(Y) would mean to allocate 2 DDs (and thus 2 backup
datasets) and write each record to both DDs.
The two tape drives allocated is probably due to UNIT=(TAPE,2) being
used for the allocate (ie: Allocate 2 drives and switch to the 2nd
drive/tape at EOV on the first tape to save time when you
rewind/unmount it and need a second tape mounted to continue to
backup file create [the 2nd tape is already mounted/ready]).
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