HP OpenVMS Systems Documentation

$ MOUNT DYA0:  TESTSYS/COMMENT="Volume in cabinet 6,
once again with feeling."
%MOUNT-I-OPRQST, Please mount volume TESTSYS in device _DYA0:
Volume in cabinet 6, once again with feeling.
%MOUNT-I-OPREPLY, Substitute DYA1:
31-DEC-1990 10:43:42.30, request 3 completed by operator TTB6
%MOUNT-I-MOUNTED, TESTSYS    mounted on _DYA1:

/CONFIRM virtual-unit-name[:] /SHADOW=(physical-dev-name[:][,...])

/NOCONFIRM virtual-unit-name[:] /SHADOW=(physical-dev-name[:][,...])

This qualifier controls whether MOUNT issues a request to confirm a full copy operation when mounting a shadow set. The /SHADOW qualifier must be used with the /CONFIRM qualifier. Use /CONFIRM to display the volume label and volume owner for any specified physical device that is a target for a copy operation. MOUNT stops before any copy operations occur and issues the following prompt:

Allow FULL shadow copy on the above member(s)? [N]:

If you respond Y or YES, the mount operation continues automatically with copy operations allowed. If you respond N, NO, <RETURN>, or <Ctrl/Z>, the command quits without mounting any of the specified volumes (including volumes that did not require copy operations). If you type a response other than those listed above, MOUNT reissues the prompt.

The /CONFIRM qualifier is similar to /NOCOPY. Use /CONFIRM to mount shadow sets interactively; use /NOCOPY in the site-specific startup command procedure SYS$MANAGER:SYSTARTUP_VMS.COM.

Example

The following example shows how to use the /CONFIRM qualifier to check the status of potential shadow set members before any data is erased. The command instructs MOUNT to build a shadow set with the specified devices, and prompts for permission to perform a copy operation. The response of YES instructs MOUNT to mount the shadow set.

$MOUNT/CONFIRM DSA0:/SHADOW=($200$DKA200:,$200$DKA300:,$200$DKA400:) X5OZCOPY

%MOUNT-F-SHDWCOPYREQ, shadow copy required
Virtual Unit - DSA0                       Volume Label - X5OZCOPY
     Member                    Volume Label Owner UIC
     $200$DKA200: (VIPER1)     X5OZCOPY     [SYSTEM]
     $200$DKA400: (VIPER1)     X5OZCOPY     [SYSTEM]
Allow FULL shadow copy on the above member(s)? [N]:)
Y

%MOUNT-I-MOUNTED, X5OZCOPY mounted on _DSA0:
%MOUNT-I-SHDWMEMSUCC, _$200$DKA300: (VIPER1) is now a valid member of
the shadow set
%MOUNT-I-SHDWMEMCOPY, _$200$DKA200: (VIPER1) added to the shadow set
with a copy operation
%MOUNT-I-SHDWMEMCOPY, _$200$DKA400: (VIPER1) added to the shadow set
with a copy operation

/COPY virtual-unit-name[:] /SHADOW=(physical-dev-name[:][,...]) (default)

/NOCOPY virtual-unit-name[:] /SHADOW=(physical-dev-name[:][,...])

The /COPY qualifier instructs MOUNT to perform copy operations on shadow set members. You can mount shadow sets with /NOCOPY to test if proposed shadow set members are targets of copy operations. If any of the specified volumes is a target of a copy operation, the command quits without mounting any of the specified volumes (including those that did not require a copy operation).

The /NOCOPY qualifier is similar to /CONFIRM. Use /NOCOPY to mount shadow sets in the site-specific startup command procedure SYS$MANAGER:SYSTARTUP_VMS.COM; use /CONFIRM for interactive mounting.

Example

The following example shows how to use the /NOCOPY qualifier to check the status of potential shadow set members before any data is erased. The command instructs MOUNT to build a shadow set with the specified devices only if a copy operation is not required. Because the device DUA7 required a copy operation to become a member of the shadow set, the mount failed. You could reissue the command specifying /COPY to instruct MOUNT to build the shadow set providing the necessary copy operation.

$ MOUNT/NOCOPY DSA2: /SHADOW=($1$DUA4:,$1$DUA6:,$1$DUA7:) -
_$  SHADOWVOL DISK$SHADOWVOL
%MOUNT-F-SHDWCOPYREQ, shadow copy required
%MOUNT-I-SHDWMEMFAIL, DUA7: failed as a member of the shadow set
%MOUNT-F-SHDWCOPYREQ, shadow copy required

/DATA_CHECK[=(keyword[,...])]

The keyword, READ, performs checks following all read operations, and the keyword, WRITE, performs checks following all write operations.

You can specify either or both of the keywords. If you specify more than one keyword, separate them by commas and enclose the list in parentheses.

If you specify the /DATA_CHECK qualifier without specifying a keyword, MOUNT defaults to /DATA_CHECK=WRITE.

Example

The following command mounts a volume labeled SAM on CLEMENS$DKA2 and assigns the logical name BOOK. The /DATA_CHECK=READ qualifier overrides a previous INITIALIZE/DATA_CHECK=WRITE specification, so that subsequent read operations on BOOK are subject to data-checking operations.

$ MOUNT/DATA_CHECK=READ CLEMENS$DKA2: SAM  BOOK

/DENSITY=keyword

The densities supported for tapes are shown in the following table:

When you initialize a tape with the INITIALIZE command and do not specify a density, the tape is initialized at the default density for the media and drive you are using (usually the highest density available).

The density of a tape can only be changed if the tape is at beginning-of-tape (BOT). To change the density of a tape that has previously been recorded, the first operation must be a write operation. If the first operation on the tape is a read operation, the magnetic tape is set to the density at which the first record on the tape was recorded, no matter what density is specified with the /DENSITY qualifier.

Example

The following command mounts a tape on the MFA0: drive /FOREIGN and assigns it the logical name TAPE. The /DENSITY qualifier specifies that the tape is to be written at TK87.

$ MOUNT/FOREIGN/DENSITY=TK87  MFA0: TAPE

/EXTENSION=n

The parameter, n, specifies a value from 0 to 65,535 to override the value specified when the volume was initialized.

Example

The following command mounts a volume labeled DOC on DKA0, assigns the logical name WORK, and specifies a default block extent of 64 for the files on WORK:

$ MOUNT/EXTENSION=64 DKA0: DOC WORK

/FOREIGN

Use the /FOREIGN qualifier when a magnetic tape volume is not in the standard ANSI format, or when a disk volume is not in Files-11 format.

If you mount a volume with the /FOREIGN qualifier, the program you use to read the volume must be able to process the labels on the volume, if any. The OpenVMS operating system does not provide an ancillary control process (ACP) to process the volume.

You must mount DOS-1 and RT-11 volumes with the /FOREIGN qualifier and process them with the Exchange utility (EXCHANGE). Refer to the OpenVMS Exchange Utility Manual (available on the Documentation CD-ROM).

The default protection applied to foreign volumes is RWLP (Read, Write, Logical I/O, Physical I/O) for the system and owner and no access for the group and world. If you also specify /GROUP, group members are also given RWLP access. If you specify /SYSTEM or /SHARE, the group and world are both given RWLP access. Note that the /GROUP, /SYSTEM, and /SHARE qualifiers do not alter the default protection.

If you mount a volume currently in Files-11 format with the /FOREIGN qualifier, you must have the user privilege VOLPRO, or your UIC must match the UIC on the volume.

The /FOREIGN qualifier is incompatible with the following qualifiers: /ACCESSED, /AUTOMATIC, /BIND, /CACHE, /[NO]CONFIRM, [NO]COPY, /EXTENSION, /HDR3, /INITIALIZE, /LABEL, /PROCESSOR, /QUOTA, /REBUILD, /SHADOW, /OVERRIDE=EXPIRATION, and /WINDOWS.

Examples

The following command mounts a foreign magnetic tape on drive MTA1:

$ MOUNT/FOREIGN MTA1: ABCD TAPE

The following command mounts an RK07 device as a foreign volume on DMA2 and assigns the logical name SAVEDISK. As a volume that is not file structured, SAVEDISK can be used for sequential-disk BACKUP save operations.

$ MOUNT/FOREIGN DMA2: SAVEDISK

/GROUP

The logical name for the volume is placed in the group logical name table. You must have the user privilege GRPNAM to use the /GROUP qualifier.

Note that if the volume is owned by a group other than yours, access may be denied because of the volume protection.

The /GROUP qualifier is not valid for ISO 9660 volume sets.

The /GROUP qualifier is incompatible with the /OVERRIDE=IDENTIFICATION, /SHARE, and /SYSTEM qualifiers.

Examples

The following command mounts and makes available on a group basis the volume set consisting of volumes labeled PAYVOL1, PAYVOL2, and PAYVOL3. The logical name PAY is assigned to the set; anyone wanting to access files on these volumes can refer to the set as PAY.

$ MOUNT/GROUP DB1:, DB2:, DB3: PAYVOL1,PAYVOL2,PAYVOL3  PAY

The following command adds the volume labeled PAYVOL4 to the existing volume set MASTER_PAY. The root volume for the volume set must be on line when you enter this command.

$ MOUNT/GROUP/BIND=MASTER_PAY DB4: PAYVOL4

/HDR3 (default)

/NOHDR3

By default, header label 3 is written. You can specify the /NOHDR3 qualifier to write magnetic tapes that are to be used on other systems that do not process HDR3 labels correctly.

Example

In the following example, the INITIALIZE and MOUNT commands prepare an ANSI-formatted magnetic tape for processing. The /NOHDR3 qualifier specifies that no HDR3 labels are to be written, thus creating a magnetic tape that can be transported to systems that do not process implementation-dependent labels correctly.

$ INITIALIZE  MTA0: ABCD
$ MOUNT/NOHDR3 MTA0: ABCD

/INCLUDE virtual-unit-name[:] /SHADOW=(physical-device-name[:][,...])

/NOINCLUDE virtual-unit-name[:] /SHADOW=(physical-device-name[:][,...]) (default)

The /INCLUDE qualifier automatically mounts and restores a shadow set to the way it was before a system failure. Supply the exact virtual-unit name that was used when the shadow set was originally mounted. Use the virtual-unit naming format DSAnnnn:.

You must also include the /SHADOW qualifier and specify at least one of the disk devices from the original shadow set. Use the standard device-naming format $allocation-class$ddcu[:]. Omit the parentheses if you name only one device.

The /INCLUDE qualifier is position independent; it can appear anywhere on the command line.

The default qualifier is /NOINCLUDE.

Example

The following example shows how to create a shadow set wherein the software determines automatically the shadow set members that should be mounted. The /SHADOW qualifier ensures the correct copy operation for the two shadow set members. In this case, $1$DUA10 is the more current volume and becomes the source of the copy operation to $1$DUA11.

If the shadow set was properly dismounted and no write I/O requests remain outstanding, the shadow set devices are consistent and are added back without the need for a copy or merge operation. Otherwise, Volume Shadowing for OpenVMS automatically performs a copy or merge operation.

$ MOUNT/INCLUDE DSA0: /SHADOW=$1$DUA10: SHADOWVOL
%MOUNT-I-MOUNTED, SHADOWVOL mounted on DSA0:
%MOUNT-I-SHDWMEMSUCC, _$1$DUA10: (MEMBER1) is now a valid member of
the shadow set
%MOUNT-I-SHDWMEMCOPY, _$1$DUA11: (MEMBER2) added to the shadow set
with a copy operation

/INITIALIZE=CONTINUATION

Example

The /INITIALIZE=CONTINUATION qualifier instructs the MOUNT command to assign its own continuation label. In this case, the operator can enter the command REPLY/BLANK=n, and the system assigns a label derived from the original. It uses the label specified in the MOUNT command and adds the appropriate number (ABCD02, ABCD03, and so forth).

$ MOUNT/INITIALIZE=CONTINUATION MTA0: ABCD

/LABEL (default)

/NOLABEL

The default is /LABEL.

Note that /NOLABEL is equivalent to /FOREIGN; they both set the FOREIGN flag.

Example

The following command mounts an ANSI-labeled magnetic tape on MFA1 and assigns the logical name TAPE:

$ MOUNT/LABEL MFA1: TAPE

/MEDIA_FORMAT=CDROM

The /MEDIA_FORMAT=CDROM qualifier instructs the mount subsystem to attempt to mount a volume assuming the media to be ISO 9660 (or High Sierra) formatted.

/MEDIA_FORMAT=[NO]COMPACTION

The /MEDIA_FORMAT qualifier allows you to mount a tape and enable data compaction and record blocking on a tape drive that supports data compaction. Data compaction and record blocking increase the amount of data that can be stored on a single tape.

Records can either be compacted and blocked, or they can be recorded in the same way that they would be recorded on a noncompacting tape drive. Note that for compacting tape drives, once data compaction or noncompaction has been selected for a given tape, that status applies to the entire tape.

The /MEDIA_FORMAT=[NO]COMPACTION qualifier is incompatible with the /DENSITY qualifier.

For Files-11 tapes, when you enable data compaction, caching is automatically enabled.

Examples

The following command performs a foreign mount of a tape with data compaction and record blocking enabled and assigns the logical name BOOKS to the tape:

$ MOUNT/FOREIGN/MEDIA_FORMAT=COMPACTION MUA0: BOOKS

The following MOUNT command attempts a Files-11 mount of a tape labeled BOOKS with data compaction and record blocking enabled. Because the tape was initialized with compaction disabled, the MOUNT qualifier /MEDIA_FORMAT=COMPACTION has no effect.

$ INIT/MEDIA_FORMAT=NOCOMPACTION MUA0: BOOKS
$ MOUNT/MEDIA_FORMAT=COMPACTION MUA0: BOOKS

/MESSAGE (default)

/NOMESSAGE

If you specify /NOMESSAGE during an operator-assisted mount, messages are not output to SYS$OUTPUT; the operator sees them, however, provided an operator terminal is enabled.

Example

In this example, an RL02 device labeled SLIP is mounted on drive DLA0 and is assigned the logical name DISC. The /NOMESSAGE qualifier disables the broadcast of mount request messages to the user terminal.

$ MOUNT/NOMESSAGE DLA0: SLIP DISC

/MOUNT_VERIFICATION (default)

/NOMOUNT_VERIFICATION

The /MOUNT_VERIFICATION qualifier affects the following media:

• Files-11 Structure Level 2 or 5 disks (mount verification is not supported for foreign-mounted disks)
• ISO 9660 and High Sierra CD-ROMs
• Foreign and ANSI-labeled magnetic tape volumes

Example

The following command mounts an HSG80 Fibre Channel disk device labeled FILES and assigns the logical name WORK. The /CACHE qualifier disables extent caching, file identification caching, quota caching, and writeback caching; the /NOMOUNT_VERIFICATION qualifier disables mount verification.

$ MOUNT/CACHE=(NOEXTENT,NOFILE_ID,NOQUOTA,WRITETHROUGH) -
_$ /NOMOUNT_VERIFICATION  $1$DGA0: FILES WORK
%MOUNT-I-MOUNTED, FILES         mounted on _$1$DGA0: (NODE)

/MULTI_VOLUME

/NOMULTI_VOLUME (default)

Use /MULTI_VOLUME to override access checks on volumes that do not contain labels that MOUNT can interpret. If you have software produced before OpenVMS Version 5.0 that processes multiple-volume, foreign-mounted tape volumes without specifically mounting and dismounting each reel, you may now need to mount the first volume with the /MULTI_VOLUME qualifier.

Use this qualifier when a utility that supports multiple-volume, foreign-mounted magnetic tape sets needs to process subsequent volumes, and these volumes do not contain labels that the OpenVMS Mount command can interpret.

By default, all tape volumes are subject to the complete access checks of the OpenVMS Mount command (MOUNT). Some user-written and vendor-supplied utilities used prior to OpenVMS Version 5.0 may mount only the first tape in a foreign tape set. To make these utilities compatible with more recent versions of OpenVMS, alter them to perform explicit calls to the $MOUNT and $DISMOU system services for each reel in the set. As an alternative, you can now mount the magnetic tape sets to be used by these utilities with the /MULTI_VOLUME qualifier.

You must specify the /FOREIGN qualifier with the /MULTI_VOLUME qualifier and you must have the user privilege VOLPRO. The default is /NOMULTI_VOLUME.

Example

The following command mounts a tape volume set. MOUNT performs an access check on the first volume in the set and proceeds without checks to subsequent reels as they are needed for processing.

$ MOUNT/FOREIGN/MULTI_VOLUME MUA0:

/OVERRIDE=(keyword[,...])

You need the user privileges OPER and VOLPRO to specify /OVERRIDE=(ACCESSIBILITY, EXPIRATION) along with the /FOREIGN qualifier; otherwise, the magnetic tape is not read.

If you specify more than one keyword, separate them with commas and enclose the list in parentheses.

The following table lists the keywords for this qualifier: