Under normal usage, that shouldn't be a problem. This was talked about on
the list within the last couple of months. With tape control units, from
the 3480 on, there is an electronic latch that gets set when VM "attaches"
a drive or MVS "allocates" one. There is an option on ATTACH that will
allow the latch not to be set, but just a plain ATTACH will turn on the
latch. Alan Altmark explained this in good detail when this thread came up
at the time. This certainly was an issue with the older drives. I can't
tell you how many times I've seen tapes get written on in the middle or
rewound right in the middle of a backup or whatever.
Jim
At 01:03 PM 6/22/2006, you wrote:
Bob,
Don't forget. You also need to ensure that MVS and VM don't concurrently
use the same tape drives. I believe you'll either need to segregate the
drives between your systems or invest in something like CA's MIM/VM.
Dennis
Jim Bohnsack
Cornell Univ.
(607) 255-1760
