[comp.os.vms] MOUNT - BACKUP - DISMOUNT - MOUNT problem

STAM@HROEUR51.BITNET (AC Stam EUR/ERC) (05/18/88)

Anyone experienced problems trying to mount
a tape unit which had been dismounted by a
process while a subprocess was backupping ?

ARJAN@HROEUR51.BITNET

carl@CITHEX.CALTECH.EDU (Carl J Lydick) (05/22/88)

 > Anyone experienced problems trying to mount a  tape  unit  which  had  been
 > dismounted by a process while a subprocess was backupping ?

Your problem is probably actually an "ALLOCATE-MOUNT-DISMOUNT-MOUNT" problem.
The sequence ALLOCATE-MOUNT-DISMOUNT from a subprocess results in the device
being allocated to the top-level process, and not the subprocess.  Thus
the device is "not available for mounting" when you try to mount it again.
The only workarounds I know of are:
	1)  Do the work from a top-level process; or
	2)  Don't explicitly allocate the device.