🚀 go-pugleaf

VMBACKUP and the VMARCH Merge/Purge Utility (MPU) can be configured to
use VMTAPE.  In the past we have never used VMTAPE for this.  For a
recent MPU, we used the version of VMAMNT that interfaces with VMTAPE.
That worked fine until a tape error occurred.  The natural thing to
want to do is use the twin in place of the primary, but you can't mount the
twin because the twin name is different than the primary (and the
VMTAPE MOUNT command issued by VMAMNT calls for the primary).  The
only way to use the twin, that I can see, is to rerun MPU with the
VMAMNT that doesn't use VMTAPE.

As far as I can see, this situation would also occur using VMBACKUP
with VMTAPE.

Is there some way of handling twins with the VMTAPE interface that I'm
missing?

Bob Fowles, Center for Academic Computing, Penn State.