I see I was my usual overly-terse self again.
The operators' only role in this is to stick the right tape in the right
drive. They don't issue any commands in relation to any of this. One SVM
issues a mount request, another SVM validates the tape label (or at
least that there's a tape mounted) and gives the drive (and tape) to the
first SVM, and the SVM performs the SPXTAPE DUMP and then logs off.
The symptom is, for at least two straight nights, the volume-validation
SVM has complained that it's not the right tape, and a manual check
shows, there's no volume label on the tape.
I'd love to blame my operators, but I can't figure out how to, so it
looks like one or the other of my SVMs is clobbering the tape's standard
label.
Nick