Backing up a disk volume
    To back up a disk volume, perform the following steps:
    1.  Choose "Save Volume ..." from the File menu and choose "Save a
        volume as a baseline for incremental backups" from the list box.
    2.  Fill in the field values on the Save Volume screen.  For example:
        Input
         Device Name         : USERS$DISK
        Output
         Save Set Device Name: MUA0:
         Save Set File Name  : USERS_BASE.BCK
        Miscellaneous
         Tape Label(s)       : USER01,USER02,USER03
         Listing File Name   : USERS$DISK.LIS
         Save Set Comment    : USERS$DISK baseline backup
    3.  Choose any options you want from the Options menu.
    4.  Press PF4 or choose "Start Operation" from the File menu.
    This example shows how to create a baseline backup of all the files
    on the USER$DISK disk device.  If you want to save only files that
    are new or changed since the most recent backup of the USER$DISK
    files, choose "Save an incremental backup of a volume" from the "Save
    Volume ..." list box and modify the other field values accordingly.