Hello Fish,
Thanks for taking your precious time to look at this.?
Yes, device 481 is a 3420 indeed. And VM is not confused, he's just sending a confusing message. :-)
If I am reading its documentation properly, VM/370 does not support the subsequent models of magnetic tape you mention. Even though addresses 4A0-4A15 are defined as 3480 in DMKRIO, they don't seem to work. And defining a 3480 on 481 in the Hercules configuration file does not fool VM/370 either. We still get message DMKTAP516I and even a new one, DMKTAP500I.
Anyway, now the situation is clear and we know that /attach, devinit, detach is a simple, fast and perfectly legit sequence.
Cheers,
Rene FERLAND, Montreal
P.S. -- I will still unmount the tape manually, because I hate seeing message DMKTAP516I. :-)
?
René Ferland