Updated: 11 December 1998

OpenVMS System Management Utilities Reference Manual

This section describes and provides examples for the Mount utility qualifiers. The Mount utility does not have subcommands.

/ACCESSED

Specifies, for ODS1 disk volumes, the approximate number of directories that will be in use concurrently on the volume.

Format

/ACCESSED= n

Parameter

n

Specifies the approximate number of directories that will be in use concurrently on an ODS1 volume. (The /ACCESSED qualifier is meaningless for ODS2 volumes.) Specify a value from 0 to 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 DBA1, specifying 150 as the number of active directories on the volume.

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

Format

/ASSIST

/NOASSIST

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. Refer to the description of the REPLY command in the OpenVMS DCL Dictionary for more information about enabling and disabling operator terminals.

Any operator reply to a mount request is written to SYS$OUTPUT 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. Refer to the OpenVMS 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 DMA0: DOC WORK
%MOUNT-I-MOUNTED, DOC         mounted on _NODE$DMA0:
      

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.

Determines whether MOUNT enables or disables automatic volume switching and labeling for magnetic tape or ISO 9660 CD-ROM.

Format

/AUTOMATIC

/NOAUTOMATIC

Description

The default is /AUTOMATIC.

Magnetic Tape

If you have multiple magnetic tape drives allocated to a volume set, the magnetic tape ancillary control process (MTACP) performs the volume switch by sequentially selecting the next available drive allocated to the volume set. The MTACP expects the next reel of the volume set to be loaded on that drive.

If the MTACP 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 MTACP 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 MTACP sends a message to the operator's console to prompt for the correct magnetic tape.

The label generated by the MTACP 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 underscores 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 MTACP 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.

ISO 9660 CD-ROM

Under ISO 9660, not all volume-set members must be mounted to perform I/O operations against that volume set. By default, if I/O operations attempt to access an unmounted volume-set member, an operator message is sent to all DISK CLASS operators for system-mounted volume sets, or the owning process for privately mounted volume sets. The message specifies the volume-set member to mount to complete the I/O operation requested. If /NOAUTOMATIC is specified, then an I/O operation to a nonmounted volume set member completes with an error message SS$_DEVNOTMOUNT.

Example

$ MOUNT/NOAUTOMATIC MTA0: 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 instead. If the second volume is not already labeled, then the operator must use REPLY/INIT and supply the second label.

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

Format

/BIND= volume-set-name

Parameter

volume-set-name

Specifies a 1- to 12-alphanumeric-character name identifying the volume set.

An ISO 9660 volume-set name can be from 1 to 128 characters in length.

OpenVMS requires volume-set names to be unique in the first 12 characters. In addition, if the first 12 characters of volume-set name are the same as the first 12 characters of any volume label, a lock manager deadlock will occur. To avoid this problem, you must override either the volume label (by using the /OVERRIDE qualifier) or the volume-set name (by using the /BIND qualifier).

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 positions 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.

If you mount an ISO 9660 volume using the /SYSTEM or /CLUSTER qualifier, and the volume label is not unique within the first 12 characters, you must supply an alternate 12-character volume label using the qualifier /BIND=volume-set-name. If you choose this option, then Mount verification is disabled for the device.

Note Once a volume is bound into a volume set, it cannot easily be unbound. To unbind a bound volume set (BVS): Do an image backup of the BVS. Initialize all volumes of the BVS. Do an image restore to a single volume with the /NOINITIALIZE qualifier, or do a nonimage restore to a single volume.

Examples

$ MOUNT/BIND=LIBRARY  DMA0:,DMA1:,DMA2:  BOOK1,BOOK2,BOOK3
      

This command creates a volume set named LIBRARY. This volume set consists of the volumes labeled BOOK1, BOOK2, and BOOK3, which are mounted physically on devices DMA0, DMA1, and DMA2, respectively.

$ MOUNT/BIND=TEST3 DSA3011/SHADOW=($1$DUA402:,$1$DUA403:),
DSA3012/SHADOW=($1$DUA404:,$1$DUA405:) TEST3011,TEST3012 TEST3
      

This command creates a volume set with the logical name TEST3. The volume set TEST3 is shadowed, and each element of the volume set (TEST3011 and TEST3012) is itself a shadowset.

Specifies the default block size for magnetic tape volumes.

Format

/BLOCKSIZE= n

Parameter

n

Specifies the default block size value for magnetic tape volumes. Valid values are in the range 20 to 65,532 for OpenVMS RMS operations, and 18 to 65,534 for non OpenVMS 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.

Description

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 sizes exceed 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.

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

Format

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

/NOCACHE

Keywords

EXTENT[=n]

NOEXTENT

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=0; both disable extent caching.

FILE_ID[=n]

NOFILE_ID

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=1; both disable file identification caching.

LIMIT=n

Specifies the maximum amount of free space in the extent cache in one-thousandths 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=0 disable quota file caching.

TAPE_DATA

Enables write caching for a magnetic tape device if the tape controller supports write caching. The /CACHE qualifier 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.

The write buffer stays enabled even after you dismount the magnetic tape. To disable the write buffer, mount a tape with the /NOCACHE qualifier.

If a tape supports compaction, then the default is compaction, and caching is enabled. For tape storage devices that support compaction, the following command is valid.

$ MOUNT TAPE_DATA/FOREIGN/MEDIA=NOCOMPACTION/NOCACHE

WRITETHROUGH

Disables the deferred write feature for file headers. By default, this feature is enabled, which improves the performance of applications, such as PATHWORKS, that use it. The deferred write feature is not available on Files-11 ODS-1 volumes.

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 do not specify the /CACHE qualifier and it is not implied by the use of the qualifier /MEDIA_FORMAT=COMPACTION, caching is enabled by default.

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.

The /NOCACHE qualifier is effective only if compaction is not enabled. If compaction is enabled (with the /MEDIA_FORMAT=COMPACTION), caching is enabled by default.

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.

Examples

$ MOUNT/CACHE=(EXTENT=60,FILE_ID=60,QUOTA=20,WRITETHROUGH) -
_$ DMA0: FILES WORK
%MOUNT-I-MOUNTED, FILES         mounted on _NODE$DMA0:
      

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 MUA0:  TAPE
%MOUNT-I-MOUNTED, TAPE  mounted on _NODE$MUA0:
      

This command mounts the volume TAPE on device MUA0 and instructs MOUNT to enable the tape controller's write cache for MUA0.

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 VMScluster (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.

You need the user privileges GRPNAM and SYSNAM, respectively, to mount group and system volumes clusterwide.

If the system is not a member of an OpenVMS Cluster, the /CLUSTER qualifier has no effect.

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                    0    Operations completed                159
    Owner process                 ""    Owner UIC                      [928,49]
    Owner process ID        00000000    Dev Prot         S:RWED,O:RWED,G:RW,W:R
    Reference count                1    Default buffer size                 512
    Total blocks               53790    Sectors per track                    22
    Total cylinders              815    Tracks per cylinder                   3
    Allocation class               2
 
    Volume label         "SNOWWHITE"    Relative volume number                0
    Cluster size                   3    Transaction count                     1
    Free blocks                51720    Maximum files allowed              6723
    Extend quantity                5    Mount count                           7
    Mount status              System    Cache name      "_$255$DWARF1:XQPCACHE"
    Extent cache size             64    Maximum blocks in extent cache     5172
    File ID cache size            64    Blocks currently in extent cache      0
    Quota cache size              25    Maximum buffers in FCP cache        349
 
 
  Volume status: ODS-2, subject to mount verification, 
      file high-water marking, write-through 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.

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

Format

/COMMENT= string

Parameter

string

Specifies a text string that is output to the operator log file and the current SYS$OUTPUT device. The string must contain no more than 78 characters.

Examples

$ MOUNT DYA1:  TESTSYS/COMMENT="Volume in cabinet 6."
%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 DYA1. Notice that the /COMMENT qualifier is used to inform the operator of the location of the volume. After the operator places the volume in DYA1, MOUNT retries the operation. After the operation completes, the operator request is canceled.

$ MOUNT DYA1:  TESTSYS/COMMENT="Volume in cabinet 6."
%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-1990 10:27:38.15, request 2 pending by operator TTB6
%MOUNT-I-OPREPLY, This is a '/abort' response from the operator.
31-DEC-1990 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 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:
      

This command requests the operator to mount the volume TESTSYS on the device DYA0. In this example, the operator notices that the requested device is in use and redirects the mount to device DYA1.

Causes MOUNT to pause and request confirmation before performing a copy operation on the specified disk device. Applicable only if you have the volume shadowing option. Refer to Volume Shadowing for OpenVMS.

Format

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

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

Description

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

$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
      

This command 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.

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