HP 3000 Manuals

MPE/iX Quick Reference Guide

DISMOUNT 

Causes a volume set that was explicitly reserved by the user (with a
MOUNT or VSRESERVE command) to be released.  The equivalent MPE/iX
command is VSRELEASE.

         [{*            }]
DISMOUNT [{(blank)      }][.groupname[.acctname]]
         [{volumesetname}]
     DISMOUNT MYSET.B.C 

MPE/iX 5.0 Documentation