/sys$common/syshlp/helplib.hlb MOUNT, Qualifiers, /POLICY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /POLICY=[NO]MINICOPY[=(OPTIONAL)], REQUIRE_MEMBERS,
       [NO]VERIFY_LABEL

    Controls the setup and use of shadow sets.

    The following table lists the keywords for this qualifier:

    Keyword        Description

    [NO]MINICOPY   Controls the setup and use of the shadowing
    [=OPTIONAL]    minicopy function.

                   The meaning of the keyword [NO]MINICOPY[=OPTIONAL]
                   for the MOUNT/POLICY qualifier depends on the
                   status of the shadow set, as follows:

                   1. If the shadow set is not mounted, either
                      on a standalone system or on any cluster
                      member, and MINICOPY=OPTIONAL is specified,
                      the shadow set is mounted and a write bitmap
                      is created. The write bitmap enables a
                      shadowing minicopy operation. You must specify
                      /MOUNT/POLICY=MINICOPY[=OPTIONAL] on the
                      initial mount of a shadow set, either on a
                      standalone system or in a cluster, to enable
                      the shadowing minicopy operation.

                      The OPTIONAL keyword allows the mount to
                      continue, even if the system was unable to
                      start the write bitmap. Likely reasons for the
                      bitmap to fail to start properly include an
                      improperly dismounted shadow set, a shadow set
                      that requires a merge operation, and various
                      resource problems. If the OPTIONAL keyword
                      is omitted and the system is unable to start
                      the write bitmap, the shadow set will not be
                      mounted.

                      If you specify the /POLICY=MINICOPY=OPTIONAL
                      qualifier and the shadow set was already
                      mounted on another node in the cluster without
                      the /POLICY=MINICOPY[=OPTIONAL], the MOUNT
                      command succeeds but a write bitmap is not
                      created.

                      If NOMINICOPY is specified, the shadow set is
                      mounted but a write bitmap is not created.

                   2. If a former member of the shadow set is
                      returned to the shadow set, which has
                      minicopy enabled, then a minicopy is started
                      instead of a full copy. This is the default
                      behavior and will occur even if you omit
                      /POLICY=MINICOPY[=OPTIONAL]. If a minicopy
                      is successfully started and then fails for some
                      reasons, a full copy is performed.

                      If a minicopy cannot be started and the keyword
                      OPTIONAL was omitted, the mount will fail.

                      If NOMINICOPY is specified, then no minicopy is
                      performed, even if one is possible.

    REQUIRE_       Requires that all of the proposed members must be
    MEMBERS        accessible before the shadow set is mounted. You
                   can specify the proposed members in the command
                   line or by using the /INCLUDE qualifier.

                   The default behavior is that if one or more
                   members is not accessible for any reason (such
                   as a connectivity failure) then the shadow set
                   will be created with the remaining members.

                   This option is especially useful in disaster
                   tolerant clusters to insure that the correct
                   member is selected as the master member following
                   an event.

    [NO]VERIFY_    Require that any member that is going to be added
    LABEL          to the shadow set must have a volume label of
                   'SCRATCH_DISK'.

                   This will help insure that the wrong disk is not
                   added to a shadow set by mistake. If VERIFY_
                   LABEL is going to be used, then the disk that
                   is going to be added to the set must be either
                   initialized with the label 'SCRATCH_DISK' or a SET
                   VOLUME/LABEL must be performed.

                   The default behavior is NOVERIFY_LABEL, which
                   indicates that the volume label of the copy
                   targets will not be checked.