Technical data

Managing Storage Media
9.5 Mounting Volumes
Table 9–13 (Cont.) MOUNT Command Qualifiers for Mounting Disks
Qualifier Description
/SHARE Specifies that other users can access the volume. (However, you must use the
/SYSTEM qualifier to mount public volumes.) Two users can access a private
volume simultaneously if they both use MOUNT/SHARE. For example:
$ MOUNT/SHARE DLA0: COST_ACCOUNT
Using the MOUNT/SHARE command on disks already mounted with the
/SYSTEM qualifier retains a lock on disk availability even if the disk is
dismounted on a systemwide basis. This practice is not usually used for
the system disk, but it can occur as a result of invoking a general-purpose
command procedure that is sometimes used on system and nonsystem disks.
If the DISMOUNT.EXE program is opened by a user and another user enters
the MOUNT/SHARE command on the system disk, a subsequent dismount
may produce a warning message that the disk cannot be dismounted. To
prevent the message, install the DISMOUNT.EXE image.
/SUBSYSTEM Enables the processing of subsystem ACEs. (The command
MOUNT/SUBSYSTEM requires the SECURITY privilege.) By default, the
disk from which you boot has /SUBSYSTEM enabled but other disks do not.
The following command uses the MOUNT command with the /SUBSYSTEM
qualifier to enable the processing of subsystem ACEs on the DUA0: device
(DOC is the volume label; WORK8 is an optional logical name for the volume):
$ MOUNT/SUBSYSTEM/SYSTEM DUA0: DOC WORK8
/SYSTEM Requires SYSNAM privilege; makes the volume public, that is, available to all
users of the system, as long as the UIC-based volume protection allows them
access. The following command mounts the volume labeled WORK and makes
it available systemwide:
$ MOUNT/SYSTEM DUA1: WORK
/UCS_
SEQUENCE=escape_
sequence
Supplies the escape sequence to select the coded graphic character set, a
requirement when mounting an ISO 9660 volume for one of its Supplementary
Volume Descriptors (SVDs).
/UNDEFINED_FAT Establishes default file attributes to be used for records on ISO 9660 media for
which no record format has been specified.
/WINDOWS=n Requires OPER privilege; specifies the number of mapping pointers to be
allocated for file windows. The default number of windows is set with the
INITIALIZE command. The following example specifies a modest number of
pointers:
$ MOUNT/WINDOWS=4 DUA3:
9.5.2 Using MOUNT Command Qualifiers When You Mount Tapes
Table 9–14 lists MOUNT command qualifiers you can use to mount a tape
volume. For a complete list of MOUNT command qualifiers, refer to the
OpenVMS System Management Utilities Reference Manual.
Unless otherwise noted, you must have VOLPRO privilege to use any of these
qualifiers when the volume is a standard-labeled volume containing protection
that disallows your process from accessing the volume.
Managing Storage Media 9–31