VMS Help MOUNT, Qualifiers, /BIND  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /BIND=volume-set-name

    Creates a volume set of one or more disk volumes or adds one or
    more volumes to an existing volume set.

    The parameter, volume-set-name, specifies a 1- to 12-
    alphanumeric-character name identifying the volume set.

    An ISO 9660 volume-set name can be from 1 to 128 characters in
    length.

    OpenVMS requires volume-set names to be unique in the first 12
    characters. In addition, if the first 12 characters of volume-set
    name are the same as the first 12 characters of any volume label,
    a lock manager deadlock will occur. To avoid this problem, you
    must override either the volume label (by using the /OVERRIDE
    qualifier) or the volume-set name (by using the /BIND qualifier).

    You must specify the /BIND qualifier when you first create the
    volume set or each time you add a volume to the set. To dismount
    an individual volume of the volume set, you must use the DISMOUNT
    qualifier /UNIT; otherwise, dismounting an individual volume
    dismounts the entire volume set.

    When you create a volume set, the volumes specified in the
    volume-label list are assigned relative volume numbers based
    on their positions in the label list. The first volume specified
    becomes the root volume of the set.

    When you add a volume or volumes to a volume set, the first
    volume label specified must be that of the root volume, or the
    root volume must already be on line.

    Note that if you attempt to create a volume set from two or more
    volumes that already contain files and data, the file system does
    not issue an error message when you issue the MOUNT/BIND command.
    However, the volumes are unusable as a volume set because the
    directory structures are not properly bound.

    If you mount an ISO 9660 volume using the /SYSTEM or /CLUSTER
    qualifier, and the volume label is not unique within the first
    12 characters, you must supply an alternate 12-character volume
    label using the qualifier /BIND=volume-set-name. If you choose
    this option, then Mount verification is disabled for the device.

                                   NOTE

       Once a volume is bound into a volume set, it cannot easily
       be unbound. To unbind a bound volume set (BVS):

       1. Do an image backup of the BVS.

       2. Initialize all volumes of the BVS.

       3. Do an image restore to a single volume with the
          /NOINITIALIZE qualifier, or do a nonimage restore to a
          single volume.

    Examples

    The following command creates a volume set named LIBRARY. This
    volume set consists of the volumes labeled BOOK1, BOOK2, and
    BOOK3, which are mounted physically on devices DMA0, DMA1, and
    DMA2, respectively.

    $ MOUNT/BIND=LIBRARY  DMA0:,DMA1:,DMA2:  BOOK1,BOOK2,BOOK3

    The following command creates a volume set with the logical name
    TEST3. The volume set TEST3 is shadowed, and each element of the
    volume set (TEST3011 and TEST3012) is itself a shadowset.

    $ MOUNT/BIND=TEST3 DSA3011/SHADOW=($1$DUA402:,$1$DUA403:),
    DSA3012/SHADOW=($1$DUA404:,$1$DUA405:) TEST3011,TEST3012 TEST3