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Document:	VMS 5.0 Mount Utility Manual 198804
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VMS

VMS Mount Utility Manual

OrderNumberAA-LA38A-TE

VMS Mount Utility
Manual
Order Number: AA-LA38A-TE

April 1988
This document describes the Mount Utility used to make disk and tape
volumes available for data processing on VMS operating systems.

Revision/Update Information:

This manual supersedes the VAX/VMS
Mount Utility Reference Manual,
Version 4.0.

Software Version:

VMS Version 5.0

digital equipment corporation
maynard, massachusetts

April 1988
The information in this document is subject to change without notice and should
not be construed as a commitment by Digital Equipment Corporation. Digital
Equipment Corporation assumes no responsibility for any errors that may appear
in this document.
The software described in this document is furnished under a license and may be
used or copied only in accordance with the terms of such license.
No responsibility is assumed for the use or reliability of software on equipment
that is not supplied by Digital Equipment Corporation or its affiliated companies.
Copyright © 1988 by Digital Equipment Corporation
All Rights Reserved.
Printed in U.S.A.
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requests the user's critical evaluation to assist in preparing future documentation.
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Postscript is a trademark of Adobe Systems, Inc.

Contents
PREFACE

vii

NEW AND CHANGED FEATURES

MOUNT Description

MOUNT-1

MOUNT Usage Summary

MOUNT-2

MOUNT Qualifiers
/ACCESSED
/ASSIST
/AUTOMATIC
/BIND
/BLOCKSIZE
/CACHE
/CLUSTER
/COMMENT
/CONFIRM
/COPY
/DATA_CHECK
/DENSITY
/EXTENSION
/FOREIGN
/GROUP
/HDR3
/INITIALIZE=CONTINUATION
/LABEL
/MESSAGE
/MOUNT_VERIFICATION
/MULTLVOLUME
/OVERRIDE
/OWNER_UIC
/PROCESSOR
/PROTECTION
/QUOTA
/REBUILD
/RECORDSIZE=N

MOUNT-5
MOUNT-6
MOUNT-7
MOUNT-8
MOUNT-9
MOUNT-10
MOUNT-11
MOUNT-13
MOUNT-15
MOUNT-16
MOUNT-17
MOUNT-18
MOUNT-19
MOUNT-20
MOUNT-21
MOUNT-22
MOUNT-23
MOUNT-24
MOUNT-25
MOUNT-26
MOUNT-27
MOUNT-28
MOUNT-29
MOUNT-31
MOUNT-32
MOUNT-33
MOUNT-34
MOUNT-35
MOUNT-37

Contents

/SHADOW
/SHARE
/SYSTEM
/UNLOAD
/WINDOWS
/WRITE

MOUNT Examples

INDEX

MOUNT-38
MOUNT-39
MOUNT-40
MOUNT-41
MOUNT-42
MOUNT-43
MOUNT-44

Preface
Intended Audience
This document is intended for many levels of user. It assumes, however,
that all readers are familiar with the DIGITAL Command Language (DCL).
For some Mount Utility (MOUNT) functions, you need a more extensive
knowledge of VMS or familiarity with disk and magnetic tape media, or both.
(The Guide to VMS Files and Devices and the Guide to Maintaining a VMS
System provide significant information related to the Mount Utility.)

Document Structure
This document consists of the following four sections:
•

Description-Provides a full description of the Mount Utility (MOUNT).

•

Usage Summary-Outlines the following MOUNT information:
-Invoking the utility
-Exiting the utility
-Directing output
-Restrictions or privileges required

•

Qualifiers-Describes MOUNT qualifiers, including format, parameters,
and examples.

•

Examples-Provides additional MOUNT examples.

Associated Documents
The Guide to VMS Files and Devices provides task-oriented instructions for
preparing private disk and magnetic tape volumes for processing, as well as
instructions for maintaining a VMS operating system environment. These
instructions are intend"ed to introduce the unsophisticated user to disk and
magnetic tape operations, as well as to provide guidelines for the more
experienced user and a system manager.
The VAX Volume Shadowing Manual describes how to mount volumes using
the volume shadowing option.

vii

Preface

Conventions
Convention

Meaning
In examples, a key name (usually abbreviated)
shown within a box indicates that you press
a key on the keyboard; in text, a key name is
not enclosed in a box. In this example, the key
is the RETURN key. (Note that the RETURN
key is not usually shown in syntax statements
or in all examples; however, assume that you
must press the RETURN key after entering a
command or responding to a prompt.)

viii

CTRL/C

A key combination, shown in uppercase with a
slash separating two key names, indicates that
you hold down the first key while you press the
second key. For example, the key combination
CTRL/C indicates that you hold down the key
labeled CTRL while you press the key labeled C.
In examples, a key combination is enclosed in a
box.

$SHOW TIME
05-JUN-1988 11 :55:22

In examples, system output (what the system
displays) is shown in black. User input (what
you enter) is shown in red.

$ TYPE MYFILE.DAT

In examples, a vertical series of periods, or
ellipsis, means either that not all the data that
the system would display in response to a
command is shown or that not all the data a
user would enter is shown.

input-file, ...

In examples, a horizontal ellipsis indicates
that additional parameters, values, or other
information can be entered, that preceding
items can be repeated one or more times, or
that optional arguments in a statement have
been omitted.

[logical-name]

Brackets indicate that the enclosed item is
optional. (Brackets are not, however, optional
in the syntax of a directory name in a file
specification or in the syntax of a substring
specification in an assignment statement.)

quotation marks
apostrophes

The term quotation marks is used to refer
to double quotation marks (" ). The term
apostrophe ( ') is used to refer to a single
quotation mark.

New and Changed Features
The Mount Utility (MOUNT) for VMS Version 5.0 includes the following new
qualifiers:
/MUL Tl_VOLUME
/NOMULTLVOLUME
The /MOUNT_VERIFICATION qualifier now applies to magnetic tape
volumes as well as to disk volumes.
This manual now includes the TAPE_DATA option to the /CACHE=option
qualifier, added in VMS Version 4.4. Also listed, but not described, are
the qualifiers and qualifier options available to those who have the volume
shadowing option.

MOUNT Description
When you enter the DCL command MOUNT, the Mount Utility (MOUNT)
does the following:
1

Ensures that the device has not been allocated to another user

Ensures that a volume is physically loaded on the device specified

Ensures that the label on the volume matches the label specified

For magnetic tape volumes, MOUNT also checks the volume accessibility
field of the VOLl label.
Normally, MOUNT allocates the device to the user who enters the command.
However, mounting volumes with the /SHARE, /GROUP, or /SYSTEM
qualifier deallocates the device, because the purpose of these qualifiers is to
make the volume shareable.
Any subprocess in the process tree can mount or dismount a volume for
the job. When a subprocess mounts a volume (for the job) as private, the
master process of the job becomes the owner of this device. This provision
is necessary because the subprocess may be deleted and the volume should
remain privately mounted for this job. However, when a subprocess explicitly
allocates a device and then mounts a private volume on this device, the
subprocess retains device ownership. In this situation, only subprocesses with
SHARE privilege have access to the device.
Upon successful completion of the operation, MOUNT notifies you with a
message sent to SYS$0UTPUT. If the operation fails for any reason, MOUNT
notifies you with an error message.

MOUNT-1

MOUNT Usage Summary
The Mount Utility (MOUNT) allows you to make a disk or magnetic tape
volume available for processing.

FORMAT

MOUNT device-name[:][, ... ] [volume-label{, ... ]]
[logical-name[:]]

COMMAND
PARAMETERS

device-name[:][, ... ]
Specifies the physical device name or logical name of the device on which the
volume is to be mounted. On a system where volumes are not connected to
Hierarchical Storage Controllers (HSCs), use the following format:
ddcu:
The dd describes the device type of the physical devices used. For example,
an RA60 disk drive is device type DJ, and an RABO or RABI disk drive is
device type DU. The c identifies the controller, and the u identifies the unit
number of the device.
On a system with Hierarchical Storage Controllers (HSCs), use one of the
following formats:
node$ddcu:
allocation-class$ddcu:
If your devices are dual ported to HSCs, use the allocation-class format. For
example, $I25$DUA23 represents an RABO or RABI disk with unit

number 23. The disk's allocation class is $I25$. The c part of the format is
always A for HSC disks. TROLL$DJA12 represents an RA60 disk with unit
number I2. The device is connected to an HSC named TROLL. See the VMS
VAXcluster Manual for more information about naming conventions.
Device names can be generic so that if no controller or unit number is
specified, the system attempts to mount the first available device that satisfies
those specified components of the device name(s). If no volume is physically
mounted on the specified device, MOUNT displays a message requesting that
you place the volume in the device; after you place the volume in the named
drive, MOUNT then completes the operation.
If you specify more than one device name for a disk or magnetic tape volume

set, separate the device names with either commas or plus signs. For a
magnetic tape volume set, you can specify more volume labels than device
names or more device names than volumes.

volume-label[, ... ]
Specifies the label on the volume. For disk volumes, labels can have from
I through I 2 characters; for magnetic tape volumes, labels can have from 0
through 6 characters.

MOUNT-2

MOUNT Usage Summary

If you specify more than one volume label, separate the labels with either
commas or plus signs. The volumes must be in the same volume set and
the labels must be specified in ascending order according to relative volume
number.

When you mount a magnetic tape volume set, the number of volume labels
need not equal the number of device names specified. When a magnetic
tape reaches the end-of-tape (EOT) mark, the system requests the operator to
mount the next volume on one of the devices. The user is not informed of
this request; only the operator is informed.
When you mount a disk volume set, each volume label specified in the list
must correspond to a device name in the same position in the device name
list.
The volume-label parameter is not required when you mount a volume
with the /FOREIGN or /NOLABEL qualifier or when you specify
/OVERRIDE=IDENTIFICATION. To specify a logical name when you
enter either of these qualifiers, type any alphanumeric characters in the
volume-label parameter position.

logical-name[:]
Defines a 1- through 255-alphanumeric character string logical name to be
associated with the volume.
If you do not specify a logical name, the MOUNT command assigns the
default logical name DISK$volume-label to individual disk drives; it assigns
the default logical name DISK$volume-set-name to the device on which the
root volume of a disk volume set is mounted. Note that if you specify a
logical name in the mount request that is different from DISK$volume-label
or DISK$volume-set-name, then two logical names are associated with the
device.
If you do not specify a logical name for a magnetic tape drive, the MOUNT
command assigns only one logical name, TAPE$volume-label, to the first
magnetic tape device in the list. No default logical volume set name is
assigned in this case.

The MOUNT command places the name in the process logical name table,
unless you specify /GROUP or /SYSTEM. In the latter cases, it places the
logical names in the group or system logical name table.

Note: Avoid assigning a logical name that matches the file name of an
executable image in SYS$SYSTEM. Such an assignment prohibits you
from invoking that image.
If the logical name of a volume is in a process-private table, then the name is
not deleted when the volume is dismounted.

usage summary

To invoke the Mount Utility, enter the command MOUNT at the DCL
prompt, followed by the device name, volume label, and logical name. If you
omit a parameter, MOUNT prompts you for it. You must include a device
name and a volume label (unless you specify /OVERRIDE=IDENTIFICATION
or use the /FOREIGN or /NOLABEL qualifier); the logical name is optional.
The Mount Utility returns you to the DCL level after it either successfully
completes the operation or fails, generating an error message. If you press
CTRL/Y or CTRL/C, MOUNT aborts the operation and returns you to the
DCL prompt.

MOUNT-3

MOUNT Usage Summary

You can direct output from MOUNT operations with the /COMMENT
and /MESSAGE qualifiers. When the mount operation requires operator
assistance, use /COMMENT to specify additional information to be included
with the operator request. The /COMMENT text string is sent to the operator
log file and to SYS$0UTPUT. The string must contain no more than 78
characters.
Use the /MESSAGE qualifier (this is the default) to send mount
request messages to your current SYS$0UTPUT device. If you specify
/NOMESSAGE during an operator-assisted mount, messages are not sent to
SYS$0UTPUT; the operator sees them, however, if an operator terminal is
enabled to receive messages.
Many MOUNT qualifiers require special privileges. Some qualifiers require
different privileges according to which qualifier keyword you specify. See the
individual qualifiers for details. Following is a list of MOUNT qualifiers that
require special privileges:
Qualifier

Keywords

OPER

/ACCESSED
/CACHE=

[NO]EXTENT[=n]

OPER

[NO]FILE_ID[=n]

OPER

[NO]QUOTA[=n]

OPER

/FOREIGN

VOLPR0 1

/GROUP

GRPNAM

/MUL Tl_ VOLUME

VO LP RO
ACCESSIBILITY

VOLPR0 1

EXPIRATION

VOLPR0 1

LOCK

VOLPR0 1

/OWNER_UIC=

uic

VOLPR0 1

/PROCESSOR=

UNIQUE

OPER

SAME:device

OPER

files pee

OPER and CMKRNL

code

VOLPR0 1

/OVERRIDE=

/PROTECTION=
/QUOTA

VOLPR0 1

/SYSTEM

SYSNAM

/WINDOWS=

1 Or your UIC must match the volume UIC.

MOUNT-4

Required Privilege

OPER

MOUNT
MOUNT Qualifiers

MOUNT
QUALIFIERS

The following pages describe the Mount Utility qualifiers. The qualifiers
are listed alphabetically and include examples, as needed. There are no
subcommands for the Mount Utility.

MOUNT-5

MOUNT
/ACCESSED

/ACCESSED
Specifies, for disk volumes, the approximate number of directories that
will be in use concurrently on the volume.

FORMAT
QUALIFIER
VALUE

/ACCESSED=n device-name

n
Specifies the approximate number of directories that will be in use
concurrently on the volume. Specify a value from 0 through 255 to override
the default that was specified when the volume was initialized.
You need the user privilege OPER to use/ ACCESSED.

EXAMPLE
$ MOUNT/ACCESSED=150 DBA1 WORK

This command requests the volume labeled WORK to be mounted on DBAl,
specifying 150 as the number of active directories on the volume.

MOUNT-6

MOUNT
/ASSIST

/ASSIST
Directs the mount operation to allow operator or user intervention if the
mount request fails.

FORMAT

/ASSIST device-name
/NOASSIST device-name

DESCRIPTION

When you specify the /ASSIST qualifier, MOUNT notifies the user and
certain classes of operator if a failure occurs during the mount operation. If
a failure occurs, the operator or user can either abort the operation or correct
the error condition to allow the operation to continue.
The operator-assist messages are sent to all operator terminals that are
enabled to receive messages; magnetic tape mount requests go to TAPE
and DEVICE operators, and disk mount requests go to DISK and DEVICE
operators. Thus, if you need operator assistance while mounting a disk
device, a message is sent to DISK operators. See the description of the
REPLY command in the VMS DCL Dictionary for more information about
enabling and disabling operator terminals.
Any operator reply to a mount request is written to SYS$0UTPUT to be
displayed on the user's terminal or written in a batch job log.
If no operator terminal is enabled to receive and respond to a mount assist
request, a message is displayed informing the user of the situation. If a

volume is placed in the requested drive, no additional operator response is
necessary. If the mount request originates from a batch job and no operator
terminal is enabled to receive messages, the mount is aborted. See the VMS
System Messages and Recovery Procedures Reference Manual for a description of
the error messages and their suggested user actions.
The default is/ ASSIST and can be overridden by /NOASSIST.

EXAMPLE
$ MOUNT/NOASSIST DMAO: DOC WORK
%MOUNT-I-MOUNTED, DOC
mounted on _NODE$DMAO:

This command mounts an RK07 volume labeled DOC and assigns the logical
name WORK. The /NOASSIST qualifier signals MOUNT that no operator
intervention is necessary.

MOUNT-7

MOUNT
/AUTOMATIC

/AUTOMATIC
Determines whether MOUNT enables or disables automatic volume
switching and labeling for magnetic tape.

FORMAT

/AUTOMATIC device-name
/NOAUTOMATIC device-name

DESCRIPTION

The default is /AUTOMATIC. If you have multiple magnetic tape drives
allocated to a volume set, the Magnetic Tape Ancillary Control Process
(MTAACP) performs the volume switch by sequentially selecting the next
available drive allocated to the volume set. The MTAACP expects the next
reel of the volume set to be loaded on that drive.

If the MTAACP is writing to the volume set, it creates a label and initializes
the magnetic tape with that label and the protections established for the first
magnetic tape of the volume set. If it is reading from the volume set, the
MTAACP generates the label and attempts to mount the next magnetic tape
with that label. If the drive has the wrong magnetic tape (or no magnetic
tape) loaded, the MTAACP sends a message to the operator's console to
prompt for the correct magnetic tape.
The label generated by the MTAACP fills the 6-character volume identifier
field. The first four characters of the field contain the first four characters
of the label specified in the MOUNT command, padded with an underscore
when the label is not at least four characters. The fifth and sixth characters
contain the relative volume number for this reel in the volume set.

If you specify /NOAUTOMATIC, the MTAACP requires operator intervention
to switch to the next drive during end-of-tape processing, and requires that
the operator specify a label for each new reel added to a volume set.

EXAMPLE
$ MOUNT/NOAUTOMATIC MTAO: ABCD,EFGH

This command instructs MOUNT not to generate its own label for the second
volume, but to use the ones supplied with the MOUNT command. If the
second volume is not already labeled, then the operator must use REPLY
/INIT and supply the second label.

MOUNT-8

MOUNT
/BIND

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

FORMAT

KEYWORD

/Bl ND= volume-set-name device-name[, ... ]
volume-label[, ... ]
volume-set-name
Specifies a 1- through 12-alphanumeric-character name identifying the
volume set.

DESCRIPTION

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 position 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.

EXAMPLE
$ MOUNT/BIND=LIBRARY

DMAO: ,DMA1: ,DMA2:

BOOK1,BOOK2,BOOK3

This command creates a volume set named LIBRARY. This volume set
consists of the volumes labeled BOOKl, BOOK2, and BOOK3, which are
mounted physically on devices DMAO, DMAl, and DMA2, respectively.

MOUNT-9

MOUNT
/BLOCKSIZE

/BLOCKSIZE
Specifies the default block size for magnetic tape volumes.

FORMAT
QUALIFIER
VALUE

DESCRIPTION

/BLOCKSIZE=n device-name

n
Specifies the default block size value for magnetic tape volumes. Valid
values are in the range 20 through 65,532 for VMS RMS operations, and 18
through 65,534 for non-VMS RMS operations. By default, records are written
to magnetic tape volumes in 2048-byte blocks. For foreign or unlabeled
magnetic tapes, the default is 512 bytes.

You must specify /BLOCKSIZE in two situations:
•

When mounting magnetic tapes that do not have HDR2 labels. For these
magnetic tapes, you must specify the block size. For example, you must
specify /BLOCKSIZE=512 to mount an RT-11 magnetic tape.

•

When mounting magnetic tapes that contain blocks whose size exceeds
the default block size (2048 bytes). In this case, specify the size of the
largest block for the block size.

EXAMPLE
$ MOUNT/FOREIGN/BLOCKSIZE=1000 MTA1:

In this example, the /BLOCKSIZE qualifier specifies a block size of 1000
bytes; the default for a magnetic tape mounted with the /FOREIGN qualifier
is 512.

MOUNT-10

MOUNT
/CACHE

/CACHE
For disks, controls whether caching limits established at system
generation time are disabled or overridden. With the T APE_DAT A option,
enables write caching for the tape controller specified (if the tape controller
supports write caching).

FORMAT

/CACH E=(keyword[, ... })
/NOCACHE

KEYWORDS

EXTENT[=n]
NO EXTENT
Enables or disables extent caching. To enable extent caching, you must have
the operator user privilege (OPER) and you must specify n, the number of
entries in the extent cache. Note that NOEXTENT is equivalent to EXTENT=O;
both disable extent caching.

FILE_/D[=n]
NOFILE_/D
Enables or disables file identification caching. To enable file identification
caching, you must have the operator user privilege (OPER) and you must
specify n, the number of entries, as a value greater than 1. Note that
NOFILE_ID is equivalent to FILE_ID=l; both disable file identification
caching.

LIMIT=n
Specifies the maximum amount of free space in the extent cache in onethousandths of the currently available free space on the disk.

QUOTA[=n]
NOQUOTA
Enables or disables quota caching. To enable quota caching, you must have
the operator user privilege (OPER) and you must specify n, the number of
entries in the quota cache. Normally n is set to the maximum number of
active users expected for a disk with quotas enabled. Both NOQUOTA and
QUOTA=O disable quota file caching.

TAPE_DATA
Enables write caching for a magnetic tape device if the tape controller
supports write caching. /NOCACHE is the default for mounting tape devices.
You must specify TAPE_DATA to enable write caching. If the tape controller
does not support write caching, the keyword is ignored.

WRITETHROUGH
Disables writeback caching, which writes only the file headers of files open for
write when the files are closed. Thus, if you specify the WRITETHROUGH
keyword, file headers are written to the disk on every file header operation.

MOUNT-11

MOUNT
/CACHE

DESCRIPTION

Used with the disk options, the /CACHE qualifier overrides one or more of
the present disk caching limits established at system generation time. Used
with the TAPE_DATA option, the /CACHE qualifier enables write caching
for the tape controller specified.
If you specify more than one option, separate them by commas and enclose
the list in parentheses. The options [NO]EXTENT, [NO]FILE_ID, LIMIT, and
[NO]QUOTA apply only to a disk device. The option TAPE_DATA applies
only to a tape device.
If you specify /NOCACHE for a disk device, all caching is disabled
for this volume. Note that the /NOCACHE qualifier is equivalent to
/CACHE=(NOEXTENT,NOFILE_ID,NOQUOTA,WRITETHROUGH).
If you specify /NOCACHE for a magnetic tape device, the tape controller's
write cache is disabled for this volume. This is the default for the
TAPE_DATA option.

EXAMPLES
iJ

$ MOUNT/CACHE=(EXTENT=60,FILE_ID=60,QUOTA=20,WRITETHROUGH) _$ DMAO: FILES WORK
%MOUNT-I-MOUNTED, FILES
mounted on _NODE$DMAO:

This command mounts an RK07 device labeled FILES and assigns the logical
name WORK. The /CACHE qualifier enables an extent cache of 60 entries,
a file identification cache of 60 entries, and a quota cache of 20; it disables
writeback caching.
~

$ MOUNT/CACHE=TAPE_DATA MUAO: TAPE
%MOUNT-I-MOUNTED, TAPE mounted on _NODE$MUAO:

This command mounts the volume TAPE on device MUAO and instructs
MOUNT to enable the tape controller's write cache for MUAO.

MOUNT-12

MOUNT
/CLUSTER

/CLUSTER
Specifies that after the volume is successfully mounted on the local node,
or if it is already mounted /SYSTEM on the local node, it is to be mounted
on every other node in the existing V AXcluster (that is, the volume is
mounted clusterwide).

FORMAT

/CLUSTER

DESCRIPTION

Only system or group volumes can be mounted clusterwide. If you specify
the /CLUSTER qualifier with neither the /SYSTEM nor the /GROUP
qualifier, the default is /SYSTEM. Note that you must use a cluster
device-naming convention. Use either node$device-name or
allocation-class$device-name as required by your configuration.

device-name

You need the user privileges GRPNAM and SYSNAM, respectively, to mount
group and system volumes clusterwide.
If the system is not a member of a VAXcluster, the /CLUSTER qualifier has

no effect.

MOUNT-13

MOUNT
/CLUSTER

EXAMPLE
$MOUNT/CLUSTER DOPEY$DMA1: SNOWWHITE DWARFDISK
%MOUNT-I-MOUNTED, SNOWWHITE
mounted on _DOPEY$DMA1: $ SHOW DEVICE/FULL DWARFDISK:
Disk $2$DMA1: (DOPEY). device type RK07, is online, mounted, file-oriented
device, shareable, served to cluster via MSCP Server. error logging is
enabled.
Error count
Owner process
Owner process ID
Reference count
Total blocks
Total cylinders
Allocation class
Volume label
Cluster size
Free blocks
Extend quantity
Mount status
Extent cache size
File ID cache size
Quota cache size

""
00000000
1

53790
815

Operations completed
159
Owner UIC
[928,49]
Dev Prot
S:RWED,O:RWED,G:RW,W:R
Default buff er size
512
Sectors per track
22
Tracks per cylinder
3

"SNOWWHITE"
3

51720
5

System
64
64
25

Relative volume number
0
Transaction count
1
Maximum files allowed
6723
Mount count
7
Cache name
"_$255$DWARF1:XQPCACHE"
Maximum blocks in extent cache
5172
Blocks currently in extent cache
0
Maximum buffers in FCP cache
349

Volume status: subject to mount verification, file high-water marking. writethrough caching enabled.
Volume is also mounted on DOC, HAPPY. GRUMPY, SLEEPY, SNEEZY, BASHFUL.

This MOUNT /CLUSTER command mounts the volume SNOWWHITE on
DOPEY$DMA1, then proceeds to mount the volume clusterwide. The SHOW
DEVICE/FULL command displays information about the volume, including
the other nodes on which it is mounted.

MOUNT-14

MOUNT
/COMMENT

/COMMENT
Specifies additional information to be included with the operator request
when the mount operation requires operator assistance.

FORMAT
KEYWORD

/COMMENT="string" device-name
string
Specifies the text string that is output to the operator log file and the current
SYS$0UTPUT device. The string must contain no more than 78 characters.

EXAMPLES

$MOUNT DYA1: TESTSYS/COMMENT="Volume in cabinet 6. 11
%MOUNT-I-OPRQST, Please mount volume TESTSYS in device _DYA1:
Volume in cabinet 6.
%MOUNT-I-MOUNTED TESTSYS
mounted on _DYA1:
%MOUNT-I-OPRQSTDON, operator request canceled - mount
completed successfully

This command requests the operator to mount the disk volume TESTSYS on
the device DYAL Notice that the /COMMENT qualifier is used to inform the
operator of the location of the volume. After the operator places the volume
in DYAl, MOUNT retries the operation. After the operation completes, the
operator request is canceled.
~

$MOUNT DYA1: TESTSYS/COMMENT="Volume in cabinet 6. 11
%MOUNT-I-OPRQST, Please mount volume TESTSYS in device _DYA1:
Volume in cabinet 6.
%MOUNT-I-OPREPLY, This is a '/pending' response from the operator.
31-DEC-1988 10:27:38.15, request 2 pending by operator TTB6
%MOUNT-I-OPREPLY, This is a '/abort' response from the operator.
31-DEC-1988 10:29:59.34, request 2 aborted by operator TTB6
%MOUNT-F-OPRABORT, mount aborted by operator

This command is the same as in the previous example. However, in this
example, because the requested device is in use, the operator aborts the
mount.
~

$MOUNT DYAO: TESTSYS/COMMENT="Volume in cabinet 6, once again with feeling."
%MOUNT-I-OPRQST, Please mount volume TESTSYS in device _DYAO:
Volume in cabinet 6, once again with feeling.
%MOUNT-I-OPREPLY, Substitute DYA1:
31-DEC-1988 10:43:42.30, request 3 completed by operator TTB6
%MOUNT-I-MOUNTED, TESTSYS
mounted on _DYA1:

This command requests the operator to mount the volume TESTSYS on the
device DYAO. In this example, the operator notices that the requested device
is in use and redirects the mount to device DYAL

MOUNT-15

MOUNT
/CONFIRM

/CONFIRM
Applicable only if you have the volume shadowing option. See the VAX
Volume Shadowing Manual.

MOUNT-16

MOUNT
/COPY

/COPY
Applicable only if you have the volume shadowing option. See the VAX
Volume Shadowing Manual.

MOUNT-17

MOUNT
/DATA_CHECK

/DATA_CHECK
Overrides the read-check or write-check option (or both) specified for a
volume when it was initialized.

FORMAT
KEYWORDS

/DATA_CH ECK[=(keyword[, .. .})] device-name
READ
Performs checks following all read operations.

WRITE
Performs checks following all write operations.

DESCRIPTION

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
$ MOUNT/DATA_CHECK=READ CLEMENS$DBA2: SAM BOOK

This command mounts a volume labeled SAM on CLEMENS$DBA2 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-18

MOUNT
/DENSITY

/DENSITY
Specifies the density (in bpi) at which a foreign or unlabeled magnetic tape
is to be written.

FORMAT
QUALIFIER
VALUE

DESCRIPTION

[/FOREIGN][/NOLABEL]/DENSITY=n device-name
n
Specifies a density of 800 bpi, 1600 bpi, or 6250 bpi, if supported by the
magnetic tape drive. If you do not specify a density for a magnetic tape that
was previously written, the density defaults to that of the first record on the
volume.

The specified density is used only if you specify /FOREIGN or /NOLABEL
and the first operation performed on the magnetic tape is a write.
If you specify /LABEL, or if the first operation on the magnetic tape is a read,
the magnetic tape is read or written at the density at which the first record on
the magnetic tape is recorded. The default is /LABEL.

EXAMPLE
$ MOUNT/FOREIGN/DENSITY=i600 MFAO: TAPE

This command mounts a foreign magnetic tape on drive MFAO and assigns
the logical name TAPE. The /DENSITY qualifier specifies that the magnetic
tape is to be written at a density of 1600 bpi.

MOUNT-19

MOUNT
/EXTENSION

/EXTENSION
Specifies the number of blocks by which disk files are to be extended
on the volume unless otherwise specified by an individual command or
program request.

FORMAT

/EXTENSION=n device-name

QUALIFIER
VALUE

Specifies a value from 0 through 65,535 to override the value specified when
the volume was initialized.

EXAMPLE
$ MOUNT/EXTENSION=64 DBAO: DOC WORK

This command mounts a volume labeled DOC on DBAO, assigns the logical
name WORK, and specifies a default block extent of 64 for the files on WORK.

MOUNT-20

MOUNT
/FOREIGN

/FOREIGN
Indicates that the volume is not in the standard format used by the VMS
operating system.

FORMAT

/FOREIGN

DESCRIPTION

You should 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.

device-name

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 VMS operating system does not provide an ancillary control process
(ACP) to process the volume.

You must mount DOS-11 and RT-11 volumes with the /FOREIGN qualifier
and process them with the Exchange Utility (EXCHANGE). See the VMS

Exchange Utility Manual.
The default protection applied to foreign volumes is RWLP (Read, Write,
Logical 1/0, Physical 1/0) for the system and owner. 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.
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.

EXAMPLES

$ MOUNT/FOREIGN MTA1: TAPE

This command mounts a foreign magnetic tape on drive MTAl.
~

$ MOUNT/FOREIGN DMA2: SAVEDISK

This 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-21

MOUNT
/GROUP

/GROUP
Makes the volume available to other users with the same group number in
their UICs as the user entering the MOUNT command.

FORMAT

/GROUP

DESCRIPTION

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.

device-name

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

EXAMPLES

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

This command mounts and makes available on a group basis the volume set
consisting of volumes labeled PAYVOLl, 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/BIND=MASTER_PAY _$ DB4: PAYVOL4

This 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-22

MOUNT
/HDR3

/HDR3
Controls whether ANSI standard header label 3 is written on a magnetic
tape volume.

FORMAT

/HDR3 device-name
/NOHDR3 device-name

DESCRIPTION

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
$ INITIALIZE MTAO: ABCD
$ MOUNT/NOHDR3 MTAO: ABCD

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.

MOUNT-23

MOUNT
/IN ITIALIZE=CONTI N UATION

/INITIALIZE=CONTINUATION
Specifies that any volume added to the magnetic tape volume set is
initialized before you can write to the volume.

FORMAT

/I NITIALIZE=CONTI NUATION

device-name

EXAMPLE
$ MOUNT/INITIALIZE=CONTINUATION MTAO: ABCD

This /INITIALIZE=CONTINUATION qualifier instructs the MOUNT
command to assign its own continuation label. In this case, the operator
can enter the command REPLY /TO=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-24

MOUNT
/LABEL

/LABEL
Indicates that the volume is in the standard format used by the VMS
operating system; that is, a magnetic tape volume is in the standard ANSI
format, or a disk volume is in Files-11 format.

FORMAT

/LABEL device-name
/NOLABEL device-name

DESCRIPTION

The default is /LABEL.
Note that /NO LABEL is equivalent to /FOREIGN.

EXAMPLE
$MOUNT/LABEL MFA1: TAPE

This command mounts an ANSI-labeled magnetic tape on MFAl and assigns
the logical name TAPE.

MOUNT-25

MOUNT
/MESSAGE

/MESSAGE
Causes mount request messages to be sent to your current SYS$0UTPUT
device.

FORMAT

/MESSAGE device-name
/NOMESSAGE device-name

DESCRIPTION

If you specify /NOMESSAGE during an operator-assisted mount, messages
are not output to SYS$0UTPUT; the operator sees them, however, provided
an operator terminal is enabled.

The default is /MESSAGE.

EXAMPLE
$ MOUNT/NOMESSAGE DLAO: SLIP DISC

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

MOUNT-26

MOUNT
/MOUNT_VERIFICATION

/MOUNT_VERIFICATION
Specifies that the device is a candidate for mount verification.

FORMAT

/MOUNT_VERIFICATION device-name
/NOMOUNT_VERIFICATION device-name

DESCRIPTION

The /MOUNT_VERIFICATION qualifier affects Files-11 Structure Level 2
disks, and as of VMS Version 5.0 affects foreign and ANSI-labeled magnetic
tape volumes. The default is /MOUNT_VERIFICATION.

EXAMPLE
$ MOUNT/CACHE=(NOEXTENT,NOFILE_ID,NOQUOTA,WRITETHROUGH) _$ /NOMOUNT_VERIFICATION DMAO: FILES WORK
%MOUNT-I-MOUNTED, FILES
mounted on _NODE$DMAO:

This command mounts an RK06 or RK07 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-27

MOUNT
/MULTl_VQLUME

/MULTl_VOLUME
For foreign or unlabeled magnetic tape volumes, determines whether
you override MOUNT volume-access checks. Use /MULTl_VOLUME to
override access checks on volumes that do not contain labels that MOUNT
can interpret. If you have software produced before VMS 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 /MUL Tl_VOLUME qualifier.

FORMAT

/MULTl_VOLUME device-name
/NOMULTl_VOLUME device-name

DESCRIPTION

Use this qualifier when a utility that supports multiple-volume, foreignmounted magnetic tape sets needs to process subsequent volumes, and these
volumes do not contain labels that the VMS Mount Utility can interpret.
As of VMS Version 5.0, by default, all tape volumes are subject to the
complete access checks of the VMS Mount Utility (MOUNT). Some userwritten and vendor-supplied utilities used prior to VMS Version 5.0 may
mount only the first tape in a foreign tape set. To make these utilities
compatible with VMS Version 5.0, you should 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 /MUL TLVOLUME qualifier.
You must specify the /FOREIGN qualifier with the /MULTI_VOLUME
qualifier and you must have the user privilege VOLPRO. The default is
/NOMUL TI_VOLUME.

Note: The VMS Backup Utility has been modified for VMS Version 5.0 to
explicitly perform calls to the $MOUNT and $DISMOU system services
on each reel of a foreign-mounted magnetic tape set. For additional
information, see the section on multiple volume save sets in the VMS
Backup Utility Manual.

EXAMPLE
$ MOUNT/FOREIGN/MULTI_VOLUME MUAO:

This 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-28

MOUNT
/OVERRIDE

/OVERRIDE
Inhibits one or more protection checks that the MOUNT command
performs.

FORMAT
KEYWORDS

/OVERRIDE=(keyword{, ... }) device-name
ACCESSIBILITY
For magnetic tapes only. If the installation allows, this keyword overrides
any character in the Accessibility Field of the volume. The necessity of this
keyword is defined by the installation. That is, each installation has the
option of specifying a routine that the magnetic tape file system will use to
process this field. By default, VMS provides a routine that checks this field in
the following manner:
•

If the magnetic tape was created on a version of VMS that conforms
to Version 3 of ANSI, then you must use this keyword to override any
character other than an ASCII space.

•

If a VMS protection is specified and the magnetic tape conforms to an
ANSI standard that is higher than Version 3, then you must use this
keyword to override any character other than an ASCII 1.

To use the ACCESSIBILITY keyword, you must have the user privilege
VOLPRO or own the volume.

EXPIRATION
For magnetic tapes only. Allows you to override the expiration dates of a
volume and its files. Use this keyword when the expiration date in the first
file header label of any file that you want to overwrite has not been reached.
You must have the user privilege VOLPRO or your UIC must match the UIC
written on the volume.

IDENTIFICATION
Overrides processing of the volume identifier in the volume label. Use this
keyword to mount a volume for which you do not know the label. Only the
volume identifier field is overridden. Volume protection, if any, is preserved.
The volume must be mounted /NOSHARE (either explicitly or by default).

LOCK
Directs MOUNT not to write-lock the volume as a consequence of certain
errors encountered while mounting it. Use this keyword when you are
mounting a damaged volume to be repaired using the Verify Utility. You
must have VOLPRO privilege or own the volume to use the LOCK keyword.

OWNER_IDENTIFIER
For magnetic tapes only. Overrides the processing of the owner identifier
field. Use this keyword to interchange protected magnetic tapes between
VMS and other DIGITAL operating systems.

MOUNT-29

MOUNT
/OVERRIDE

SETID
For magnetic tapes only. Prevents MOUNT from checking the file-set
identifier in the first file header label of the first file on a continuation
volume. Use this keyword only for ANSI-labeled volumes on which the
file-set identifier of the first file on a continuation volume differs from the
file-set identifier of the first file of the first volume that was mounted.

SHADOW_MEMBERSH/P
Applicable only if you have the volume shadowing option. See the VAX

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

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.

EXAMPLE
$ MOUNT/OVERRIDE=IDENTIFICATION MFAO:

This command overrides the volume identification field, thus mounting a
magnetic tape on MFAO without a label specification.

MOUNT-30

MOUNT
/OWNER_UIC

/OWNER_UIC
Requests that the specified UIC be assigned ownership of the volume
while it is mounted, overriding the ownership recorded on the volume.
Or, if you are mounting a volume using the /FOREIGN qualifier, requests an
owner UIC other than your current UIC.

FORMAT
KEYWORD

/OWNER_UIC=uic device-name
UIC
Specifies the User Identification Code (UIC) in the following format:

[group,member]
You must use brackets in the UIC specification. The group number is an
octal number in the range 0 through 37776; the member number is an octal
number in the range 0 through 17776.
To use the /OWNER_UIC qualifier for a Files-11 volume you must have
the user privilege VOLPRO, or your UIC must match the UIC written on the
volume.

EXAMPLE
$ MOUNT/OWNER_UIC=[016,360] DRA3: WORK

This command mounts a disk device labeled WORK on DRA3 and assigns an
owner UIC of [016,360].

MOUNT-31

MOUNT
/PROCESSOR

/PROCESSOR
For magnetic tapes and Files-11 Structure Level 1 disks, requests that
the MOUNT command associate an Ancillary Control Process (ACP)
to process the volume. The /PROCESSOR qualifier causes MOUNT to
override the default manner in which ACPs are associated with devices.
For Files-11 Structure Level 2 disks, controls block cache allocation.

FORMAT
KEYWORDS

/PROCESSOR=keyword device-name
UNIQUE
For magnetic tape and Files-11 Structure Level 1 disks, creates a new process
to execute a copy of the default ACP image for the specified device type or
controller.
For Files-11 Structure Level 2 disks, allocates a separate block cache.

SAME:device
For magnetic tape and Files-11 Structure Level 1 disks, uses the same ACP
process currently being used by the device specified.
For Files-11 Structure Level 2 disks, takes the block cache allocation from the
specified device.

files pee
Creates a new process to execute the ACP image specified by the file
specification (for example, a modified or a user-written ACP). You cannot
use wildcard characters, or node and directory names in the file specification.
To use this keyword, you need CMKRNL and OPER privilege.
You must have the operator user privilege OPER to use the /PROCESSOR
qualifier.

EXAMPLE
$ MOUNT/PROCESSOR=SAME:MTA1: MFAO:

This command directs MOUNT to mount a magnetic tape on MFAO using the
same ACP process currently associated with MTAl.

MOUNT-32

MOUNT
/PROTECTION

/PROTECTION
Specifies the protection code to be assigned to the volume.

FORMAT
KEYWORD

/PROTECTION=code device-name

code
Specifies the protection code according to the standard syntax rules for
specifying protection. If you omit a protection category, that category of user
is denied all access.

If you do not specify a protection code, the default is the protection that was
assigned to the volume when it was initialized.

DESCRIPTION

If you specify the /PROTECTION qualifier when you mount a volume with
the /SYSTEM or /GROUP qualifier, the specified protection code overrides
any access rights implied by the other qualifiers.
If you specify the /FOREIGN qualifier, the Execute and Delete access codes
are synonyms for Logical and Physical. You can, however, specify the access
codes P (Physical I/O) or L (Logical I/O), or both, to restrict the nature of
input/output operations that different user categories can perform.
To use the /PROTECTION qualifier on a Files-11 volume, you must have
the user privilege VOLPRO or your UIC must match the UIC written on the
volume.

EXAMPLE
$ MOUNT/PROTECTION=(SYSTEM:RWE,O:RWED,G:RE,W:R) DBA1: WORKDISK

This command mounts a device labeled WORKDISK on DBAl and assigns a
protection code. Access to the volume will be READ, WRITE, and EXECUTE
for SYSTEM users; READ, WRITE, EXECUTE, and DELETE for OWNER;
READ and EXECUTE for GROUP users; and READ-only for users in the
WORLD category.

MOUNT-33

MOUNT
/QUOTA

/QUOTA
Controls whether or not quotas are to be enforced on the specified disk
volume.

FORMAT

/QUOTA device-name
/NOQUOTA device-name

DESCRIPTION

The default is /QUOTA, which enforces the quotas for each user. The
/NOQUOTA qualifier inhibits this checking. To specify the /QUOTA
qualifier, you must have the user privilege VOLPRO or your UIC must
match the UIC written on the volume.

EXAMPLE
$ MOUNT/OWNER_UIC=[016,360]/NOQUOTA DRA3: WORK

This command specifies that the disk volume labeled WORK on DRA3 has an
owner UIC of [016,360) and no quotas enforced.

MOUNT-34

MOUNT
/REBUILD

/REBUILD
Controls whether or not MOUNT performs a rebuild operation on a disk
volume.

FORMAT

/REBUILD device-name
/NOREBUILD device-name

DESCRIPTION

If a disk volume is improperly dismounted (such as during a system failure),
you must rebuild it to recover any caching limits that were enabled on the
volume at the time of the dismount. By default, MOUNT attempts the
rebuild. For a successful rebuild operation that includes reclaiming all of the
available free space, you must mount all of the volume set members.

The rebuild may consume a considerable amount of time, depending on the
number of files on the volume and, if quotas are in use, on the number of
different file owners.
The following caches may have been in effect on the volume before it was
dismounted:
•

Preallocated free space (EXTENT cache)

•

Preallocated file numbers (FILE-1D cache)

•

Disk quota usage caching (QUOTA cache)

If caching was in effect for preallocated free space or file numbers, the rebuild
time is directly proportional to the greatest number of files that ever existed
on the volume at one time. If disk quota caching was in effect, you can expect
additional time that is proportional to the square of the number of entries in
the disk quota file.
If none of these items were in effect, the rebuild is not necessary and does
not occur.
If you use the /NOREBUILD qualifier, devices can be returned to active use
immediately. You can then perform the rebuild later with the DCL command
SET VOLUME/REBUILD (see the VMS DCL Dictionary).

For information about how to rebuild the system disk, refer to the Guide to

Setting Up a VMS System.

EXAMPLES

$ MOUNT/REBUILD NODE$DBA2: WORKDISK
%MOUNT-I-MOUNTED, WORKDISK
mounted on _NODE$DBA2:
%MOUNT-I-REBUILD, volume was improperly dismounted; rebuild in progress

In this example, the volume WORKDISK is mounted on NODE$DBA2.
Because the volume is found to have been improperly dismounted and the
/REBUILD qualifier is in effect, MOUNT displays a message and proceeds to
rebuild the volume.

MOUNT-35

MOUNT
/REBUILD

$ MOUNT/NOREBUILD NODE$DBA2: WORKDISK
%MOUNT-I-MOUNTED, WORKDISK
mounted on _NODE$DBA2:
%MOUNT-I-REBLDREQD, rebuild not performed; some free space unavailable;
diskquota usage stale

In this example, the volume WORKDISK is found to have been improperly
dismounted, but because the /NOREBUILD qualifier is specified, a rebuild
is not performed. Instead, MOUNT displays a message to inform you that
the rebuild is needed, and proceeds to make WORKDISK available for use as
is. You can rebuild the volume later with the DCL command SET VOLUME
/REBUILD.

MOUNT-36

MOUNT
/RECORDSIZE=n

/RECORDSIZE=n .
Specifies the number of characters in each record of a magnetic tape
volume.

FORMAT

/RECORDSIZE=n device-name

QUALIFIER
VALUE

Specifies the block size in the range 20 through 65,532 bytes if you are using
VMS RMS, or 18 through 65,534 bytes if you are not using VMS RMS.

DESCRIPTION

You typically use this qualifier with the /FOREIGN and /BLOCKSIZE
qualifiers to read or write fixed-length records on a block structured device.
In this case, the record size must be less than or equal to the block size
specified or used by default.
Use the /RECORDSIZE qualifier when mounting magnetic tapes without
HDR2 labels (such as RT-11 magnetic tapes) to provide VMS RMS with
default values for the maximum record size.

EXAMPLE
$ MOUNT/FOREIGN/BLOCKSIZE=512/RECORDSIZE=512 MTAO:

In this example the magnetic tape is mounted on MTAO with a default block
size and record size of 512 characters.

MOUNT-37

MOUNT
/SHADOW

/SHADOW
Applicable only if you have the volume shadowing option. See the VAX
Volume Shadowing Manual.

MOUNT-38

MOUNT
/SHARE

/SHARE
Specifies, for a disk volume, that the volume is shareable.

FORMAT

/SHARE device-name
/NOSHARE device-name

DESCRIPTION

If another user has already mounted the volume shareable, and you request it
to be mounted with the /SHARE qualifier, any other qualifiers you enter are
ignored.

By default, a volume is not shareable, and the MOUNT command allocates
the device on which it is mounted.
If you previously allocated the device and specify the /SHARE qualifier, the
MOUNT command deallocates the device so that other users can access it.

EXAMPLE
$ MOUNT/NOMESSAGE/SHARE DLAO: SLIP DISC

This command mounts the device labeled SLIP on DLAO, disables
broadcasting of MOUNT messages, specifies that the volume is shareable,
and assigns the logical name DISC.

MOUNT-39

MOUNT
/SYSTEM

/SYSTEM
Makes the volume public, that is, available to all users of the system, as
long as the UIC-based volume protection allows them access.

FORMAT

/SYSTEM

DESCRIPTION

The logical name for the device is placed in the system logical name table.
You must have the user privilege SYSNAM to use the /SYSTEM qualifier.

device-name

When you mount a volume with the /SYSTEM qualifier in a VAXcluster,
you must use a volume label that is unique clusterwide, even if the specified
volume is not mounted clusterwide.

EXAMPLES

$ MOUNT/NOMESSAGE/SYSTEM DUA1: SLIP SACH

This command mounts the volume labeled SLIP on DUAl with mount
messages disabled. The volume is made available systemwide. MOUNT also
assigns the logical name SACH.
~

$ MOUNT/SYSTEM/BIND=MASTER_PAY _$ DB1: ,DB2: ,DB3:

PAYVOL1,PAYVOL2,PAYVOL3

This command creates the volume set named MASTER_p AY consisting of
the initialized volumes labeled PAYVOLl, PAYVOL2, and PAYVOL3. These
volumes are mounted physically on the devices named DBl, DB2, and DB3,
respectively. The volume PAYVOLl is the root volume of the set.
The volumes are mounted as system volumes to make them available to all
users.

MOUNT-40

MOUNT
/UNLOAD

/UNLOAD
Controls whether or not the disk or magnetic tape volume or volumes
specified in the MOUNT command are unloaded when they are
dismounted. The default is /UNLOAD.

FORMAT

/UNLOAD device-name
/NOUNLOAD device-name

EXAMPLE
$ MOUNT/NOUNLOAD DBA1: OFFENS STRAT

In this example, the volume labeled OFFENS is mounted on DBAl with the
/NOUNLOAD qualifier so that it can be dismounted without being physically
unloaded. MOUNT also assigns the logical name STRAT.

MOUNT-41

MOUNT
/WINDOWS

/WINDOWS
Specifies the number of mapping pointers to be allocated for file windows.

FORMAT

/WINDOWS=n device-name

QUALIFIER
VALUE

Specifies a value from 7 through 80 that overrides the default value specified
when the volume was initialized.

DESCRIPTION

When a file is opened, the file system uses the mapping pointers to access
data in the file. Use MOUNT /WINDOWS to override the default value
specified when the volume was initialized. If no value was specified at
volume initialization, the default number of mapping pointers is 7.
You must have the operator user privilege (OPER) to use the /WINDOWS
qualifier.

EXAMPLE
$ MOUNT/SYSTEM/WINDOWS=25 DBA2: GONWITH THE_WINDOW

This command makes the volume labeled GONWITH on DBA2 available
systemwide and assigns the logical name THE_WINDOW. You override
the default number of mapping pointers by specifying a value of 25 for the
/WINDOWS qualifier.

MOUNT-42

MOUNT
/WRITE

/WRITE
Controls whether the volume can be written.

FORMAT

/WRITE device-name
/NOWRITE device-name

DESCRIPTION

By default, a volume is considered read/write when it is mounted. You
can specify /NOWRITE to provide read-only access to protect files. This is
equivalent to write-locking the device.

EXAMPLE
$ MOUNT/CLUSTER/NOWRITE NODE$DBA1: BOOKS

This command mounts a volume labeled BOOKS on NODE$DBA1 and
then proceeds to mount it on each node in the existing VAXcluster. The
/NOWRITE qualifier makes the volume available for read-only access.

MOUNT-43

MOUNT
MOUNT Examples

MOUNT
EXAMPLES

The following examples describe how to use the Mount Utility with and
without operator assistance.
For examples 1 and 2, operator assistance is not required, assuming the
volumes are in the drives. Examples 3 through 6 describe operator-assisted
mounts.

$ MOUNT MTAO: MATH06 STAT_TAPE
%MOUNT-I-MOUNTED, MATH06 mounted on _MTAO:
$ COPY
ST061178.DAT STAT_TAPE:

This MOUNT command requests the magnetic tape whose volume label is
MATH06 to be mounted on the device MTAO and assigns the logical name
STAT_TAPE to the volume.
Subsequently the COPY command copies the disk file ST061178.DAT to the
magnetic tape.
~

$ ALLOCATE DM:
%DCL-I-ALLOC, _DMB2: allocated
$ MOUNT DMB2: TEST_FILES
%MOUNT-I-MOUNTED, TEST_FILES mounted on _DMB2:

This ALLOCATE command requests an available RK06/RK07 device. After
the response from the ALLOCATE command, the physical volume can be
placed on the allocated device. Then, the MOUNT command mounts the
volume.
~

$ MOUNT DM: TEST_FILES
%MOUNT-I-OPRQST, Please mount volume TEST_FILES in device _DMB2:
%MOUNT-I-MOUNTED, TEST_FILES mounted on _DMB2:

This example achieves the same result as the series of commands in the
preceding example. The MOUNT command requests an available RK06
/RK07 device for the volume labeled TEST_FILES. After the volume is
physically mounted in the device named in the response from MOUNT,
the system completes the operation. Note that the device is automatically
allocated by MOUNT.
~

$ MOUNT DYA1: TESTSYS
%MOUNT-I-OPRQST, Please mount volume TESTSYS in device DYA1:
ICTRL/YI

$ EXIT

%MOUNT-I-OPRQSTCAN, operator request canceled

This MOUNT command requests the operator to mount the volume TESTSYS
on the device DYAl. In this example, the user cancels the mount by pressing
CTRL/Y. Notice that the image must exit before the mount request is actually
canceled. Here, the EXIT command causes the image to exit. However, any
command that is not performed within the command interpreter causes the
current image to exit.

MOUNT-44

MOUNT
MOUNT Examples

$MOUNT DYA1: TESTSYS
%MOUNT-I-OPRQST, Device _DYA1: is not available for mounting.
%MOUNT-I-OPRQSTCAN, operator request canceled
%MOUNT-I-OPRQST, Please mount volume TESTSYS in device _DYA1:
%MOUNT-I-MOUNTED, TESTSYS
mounted on _DYA1:
%MOUNT-I-OPRQSTDON, operator request canceled - mount
completed successfully

This MOUNT command requests the operator to mount the volume TESTSYS
on the device DYAl. Because DYAl is allocated to another user, the device
cannot be mounted. In this case, the user can wait for the device to become
available, redirect the mount to another device, or abort the mount. Here, the
user remains in operator-assisted mount waiting for the process that is using
the device to deallocate it. At this point, because the device is available but
no volume is mounted, the original mount request is canceled, and a new
request to mount TESTSYS is issued. Finally, the operator places the volume
in the drive and lets MOUNT retry the mount. When the mount completes,
the request is canceled.
~

$ MOUNT DYA1: TESTSYS/COMMENT="Is there an operator around?"
%MOUNT-I-OPRQST, Please mount volume TESTSYS in device _DYA1:
Is there an operator around?
%MOUNT-I-NOOPR, no operator available to service request

%MOUNT-I-MOUNTED, TESTSYS
mounted on _DYA1:
%MOUNT-I-OPRQSTDON, operator request canceled - mount
completed successfully

This MOUNT command requests the operator to mount the volume TESTSYS
on the device DYAl. In this example, no operator is available to service the
request. At this point, the user can abort the mount by pressing CTRL/Y,
or wait for an operator. Here, the user waited, and an operator eventually
became available to service the request.

MOUNT-45

Index
Examples (cont'd.)

A
/ACCESSED qualifier• MOUNT-6
/ASSIST qualifier• MOUNT- 7
/AUTOMATIC qualifier• MOUNT -8

B
/BIND qualifier• MOUNT-9
/BLOCKSIZE qualifier• MOUNT -10

c
/CACHE qualifier• MOUNT-11
/CLUSTER qualifier• MOUNT-13
/COMMENT qualifier• MOUNT-15
/CONFIRM qualifier• MOUNT-16
/COPY qualifier• MOUNT-17

creating a volume set• MOUNT-9
disabling automatic volume rebuild• MOUNT-35
making a volume public with MOUNT•
MOUNT-40
mounting an ANSI-labeled magnetic tape•
MOUNT-25
mounting a volume clusterwide • MOUNT-14
overriding volume protection checks•
MOUNT-30
rebuilding a volume• MOUNT-35
requesting operator assistance• MOUNT- 7
specifying a protection code• MOUNT-33
specifying a shareable volume• MOUNT-39
specifying block size for magnetic tape•
MOUNT-10
specifying default block extent• MOUNT-20
specifying magnetic tape density• MOUNT -19
specifying magnetic tape record size•
MOUNT-37
specifying number of directories• MOUNT -6
/EXTENSION qualifier• MOUNT-20

D
/DAT A_CHECK qualifier• MOUNT-18
/DENSITY qualifier• MOUNT-19
Disk
making a public volume• MOUNT-40
mounting• MOUNT-2
shareable volume
specifying• MOUNT-39
Disk volume
See also Disk
disabling automatic rebuild• MOUNT-35
overriding protection checks• MOUNT-29
rebuilding• MOUNT-35

File window mapping pointers
allocating• MOUNT-42
/FOREIGN qualifier• MOUNT-21
Foreign volume
mounting• MOUNT-21

G
/GROUP qualifier• MOUNT-22

H
/HDR3 qualifier• MOUNT-23

Examples
allocating file window mapping pointers•
MOUNT-42

lndex-1

Index

I
/INITIALIZE=CONTINUA TION qualifier•
MOUNT-24

L
Label
disk• MOUNT-2
disk volume set• MOUNT-3
magnetic tape• MOUNT-2
magnetic tape volume set• MOUNT-3
/LABEL qualifier• MOUNT-25
Logical names
with MOUNT• MOUNT -3

M
Magnetic tape
mounting• MOUNT-2
mounting ANSI-labeled• MOUNT-25
mounting multiple foreign volumes• MOUNT-28
overriding protection checks• MOUNT-29
specifying block size for• MOUNT-10
specifying density for• MOUNT-19
specifying record size for• MOUNT-37
/MESSAGE qualifier• MOUNT-26
MOUNT
See Mount Utility
Mount Utility (MOUNT)
directing output• MOUNT-4
examples• MOUNT-44 to MOUNT-45
allocating file window mapping pointers•
MOUNT-42
creating a volume set• MOUNT -9
disabling automatic rebuild• MOUNT-35
making a volume public• MOUNT-40
mounting an ANSI-labeled magnetic tape•
MOUNT-25
mounting a volume clusterwide •
MOUNT-14
overriding volume protection checks•
MOUNT-30
rebuilding a disk volume• MOUNT -35
requesting operator assistance• MOUNT- 7,
MOUNT-44

lndex-2

Mount Utility (MOUNT)
examples (cont'd.)
specifying a protection code• MOUNT-33
specifying a shareable volume• MOUNT-39
specifying block size for magnetic tape•
MOUNT-10
specifying default block extent•
MOUNT-20
specifying magnetic tape density•
MOUNT-19
specifying magnetic tape record size•
MOUNT-37
specifying number of directories•
MOUNT-6
exiting •MOUNT -3
invoking •MOUNT -3
multiple foreign tape volumes• MOUNT-28
overriding volume protection checks•
MOUNT-29
parameters• MOUNT-2
qualifiers• MOUNT-5 to MOUNT-43
requesting an Ancillary Control Process (ACP) •
MOUNT-32
restrictions• MOUNT-4
specifying a user identification code (UIC) •
MOUNT-31
/MOUNT_ VERIFICATION qualifier• MOUNT-27
/MULTI_ VOLUME qualifier• MOUNT-28

0
/OVERRIDE qualifier• MOUNT -29
/OVv'NER_UIC qualifier• MOUNT-31

p
Parameters• MOUNT-2
Privilege• MOUNT-4
/PROCESSOR qualifier• MOUNT-32
Protection
and MOUNT command •MOUNT -33
default for foreign volumes• MOUNT -21
/PROTECTION qualifier• MOUNT-33

Index

Q
Qualifiers
See Mount Utility
requiring special privileges• MOUNT -4
Quota checking
controlling• MOUNT-34
/QUOT A qualifier• MOUNT -34

Volume (cont'd.)
public
making a volume public• MOUNT-40
Volume set
adding a volume to• MOUNT-9
and MOUNT command• MOUNT-3
creating• MOUNT-9

w
/WINDOWS qualifier• MOUNT-42
/WRITE qualifier• MOUNT-43

/REBUILD qualifier• MOUNT-35
Record size
See Magnetic tape
/RECORDSIZE qualifier• MOUNT-37
Restrictions• MOUNT-4

s
/SHADOW qualifier• MOUNT -38
/SHARE qualifier• MOUNT -39
/SYSTEM qualifier• MOUNT-40

u
/UNLOAD qualifier• MOUNT -41
User identification code (UIC)
specifying• MOUNT-31

v
Volume
See also Disk volume
See also Magnetic tape
mounting• MOUNT -2
from a subprocess• MOUNT -1
mounting foreign• MOUNT -2 1
mounting with operator assistance• MOUNT- 7
protection
and MOUNT command• MOUNT -33

lndex-3

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VMS Mount Utility
Manual
AA-LA38A-TE

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