Technical data

Managing Storage Media
9.7 Mounting ISO 9660 Volume Sets and Groups
Table 9–15 ISO 9660 Restrictions
Media Affected Description and Resolution
Volume Labels These can contain from 1 to 32 characters. The first 12 characters are used to
produce a unique volume identity. If the label is not unique within the first 12
characters, the volume will not mount and the following error message is displayed:
%SYSTEM-F-VOLALRMNT, another volume of the same label already mounted
How to resolve this problem:
Mount the volume specifying a different volume label and use the
/OVERRIDE=IDENTIFICATION qualifier. This will override the volume’s label
so as not to conflict with the label of an already-mounted volume.
Volume Set Labels These can be from 1 to 128 characters in length. The first 12 characters are used to
produce a unique volume set identity. If the volume set label is not unique within
the first 12 characters, the volume will not mount and one of the following error
messages will be displayed:
%SYSTEM-F-VOLINSET, volume is already part of another volume set
%MOUNT-F-DUPRVN, duplicate volume number already mounted
How to resolve this problem:
Mount the volume specifying a new volume set label with the /BIND=volume-set-
name command qualifier.
Volume Label and
Volume Set Label
Duplication
The first 12 characters of both the volume label and the volume set label are used to
produce different lock manager resource names, which are then used to coordinate
volume and volume set associations. If both the volume label and the volume set
label are the same (within the first 12 characters, including null labels), a lock
manager deadlock error occurs and the following error message is displayed:
%SYSTEM-F-DEADLOCK, deadlock detected
How to resolve this problem:
Mount the volume specifying a different volume label and use the
/OVERRIDE=IDENTIFICATION command qualifier. This will override the volume’s
label so as not to conflict with the volume set’s label.
Undefined Record
Format Errors
Many ISO 9660 CD–ROMs are mastered without a specified record format because
the ISO 9660 media can be mastered from platforms that do not support the
semantics of files containing predefined record formats.
OpenVMS file system utilities (such as TYPE and COPY), language RTLs, and
applications that use RMS for record access may report RMS errors, utility errors,
and language errors when accessing files whose record format is undefined or appears
illegally specified.
How to resolve this problem:
Use the following command syntax at mount time to force all files of type
UNDEFINED to the STREAM record format having a maximum record length of
512 bytes:
MOUNT/MEDIA=CDROM/UNDEFINED=(STREAM:512) device label
For more information about RMS record formatting, refer to the OpenVMS Record
Management Utilities Reference Manual and the OpenVMS Record Management
Services Reference Manual.
9.8 Mounting Tape Volume Sets
The procedure for mounting a tape volume set is similar to the procedure for
mounting a single tape volume, described in Section 9.5. The number of volume
identifiers does not need to equal the number of device names you specify. In
9–50 Managing Storage Media