 MOUNT declares a volume to be logically known to the system, on-line,
 and available for use.  Some qualifiers can be used with any MOUNT
 command; some are limited to mounting disks (and other
 random-addressable devices) and others are limited to mounting
 magnetic tapes.  See also HELP MOUNT MAGTAPE.

 MOUNT For Disks and Other Random-Addressable Devices

	MOUNT[/qualifier[s]] ddnn: volumelabel

 Command Qualifiers For Both Disks and Tapes

	/DEFAULT:arg			/FILE_PROTECTION:(code)
		SAVE			/FOREIGN
		NOUNLOAD		/OVERRIDE:IDENTIFICATION
		UNLOAD			/PARAMETERS:"user parameters"
	/PROCESSOR:arg			/PROTECTION:(code)
		   acpname		/PUBLIC
		   UNIQUE		/[NO]SHAREABLE
	/SHOW				/SYSTEM	(synonym for /PUBLIC)
	/VOLUME:(volume-ID[s])		/[NO]WAIT
	/[NO]WRITE
 
 Command Qualifiers for Disks and Other Files-11 Devices
 
	/ACCESSED:n		/EXTENSION:n	/OWNER:[uic]
	/UNLOCK			/WINDOWS:arg
			                n
					(USER:n,INDEX:n)
2 MAGTAPE
 MOUNT declares a volume to be logically known to the system, on-line,
 and available for use.  Some qualifiers can be used with any MOUNT
 command; some are limited to mounting disks (and other
 random-addressable devices) and others are limited to mounting
 magnetic tapes.  See also HELP MOUNT for information on mounting disks.

 MOUNT for Magnetic Tapes

	MOUNT[/qualifier[s]] ddnn:[,ddnn:...]] fileset-ID

 Command Qualifiers for ANSI and Unlabelled Tapes
 
	/BLOCK_SIZE:n				/DENSITY:arg
	/CARRIAGE_CONTROL:arg				800
			FORTRAN				1600
			LIST				6250
			NONE				HIGH
	/[NO]HDR3					LOW
	/[NO]LABEL				/OVERRIDE:arg
	/RECORD_SIZE:n					ACCESSIBILITY
	/TRANSLATE:arg					EXPIRATION_DATE
		  EBCDIC				SET_IDENTIFICATION
		  NONE
		  UT1
		  UT2
		  UT3

 Command Qualifiers For Both Disks and Tapes

	/DEFAULT:arg			/FILE_PROTECTION:(code)
		SAVE			/FOREIGN
		NOUNLOAD		/OVERRIDE:IDENTIFICATION
		UNLOAD			/PARAMETERS:"user parameters"
	/PROCESSOR:arg			/PROTECTION:(code)
		   acpname		/PUBLIC
		   UNIQUE		/[NO]SHAREABLE
	/SHOW				/SYSTEM	(synonym for /PUBLIC)
	/VOLUME:(volume-ID[s])		/[NO]WAIT
	/[NO]WRITE
3 EXAMPLES
 Mounting of magtape volumes is handled by a special ACP, the MTAACP.  
 This ACP handles not only magtapes that meet the ANSI standard, but 
 also the most commonly encountered unlabelled tape formats.

 The MOUNT command can only mount a single random-addressable volume, 
 but magtapes can be mounted by the set.  In fact, when you mount a 
 single magtape, you are mounting a set consisting of only one tape.  A 
 magtape set consists of logically related records written on one or 
 more individual reels of tape.  Only the first tape in the set need be 
 loaded on a device at the time the MOUNT command is issued. However,
 all tapes in the set can be loaded on different devices at the time 
 the MOUNT command is issued.  

 Therefore, the terminology used for mounting magtapes is somewhat different
 from that used in mounting disks.  The tape set is identified by a File Set
 Identifier (fileset-ID).  Each individual tape in the fileset is identified
 by a Volume Identifier (volume-ID).  By default, the fileset-ID is
 the same as the volume-ID of the first individual reel of tape in the
 set.  

 If you wish to use a fileset-ID other than the volume-ID of the first 
 reel in the set, you can do on the first mount of a newly initialized tape as 
 shown an example below.

 Each installation using magtapes extensively will have policies on 
 fileset-IDs  and volume-IDs.  See your system manager or supervisor for 
 information on how they are used in your installation.

 The examples establish the relationship between fileset-ID and volume-IDs.

 The following command
 
	>MOUNT MM0: FOO

 mounts a tape set (consisting of a single physical reel) whose fileset-ID is
 FOO and whose volume-ID is FOO.  The reel FOO must be loaded on device MM0: at
 the time of the mount. 

 The following command
 
	>MOUNT MM0: DRAG /VOLUME_IDENTIFICATION:(FOO,BAR,MORE)

 mounts a tape set whose fileset-ID is DRAG and that consists of three physical
 reels with volume-IDs of FOO, BAR, and MORE. The reel with the volume-ID FOO
 must be loaded on device MM0:, but the other two reels are not loaded at the
 time of the mount.  The fileset-ID of the tape set was established with the
 first mount of the newly initialized tape set, using this same command.  If
 this were the first mount, the fileset-ID DRAG would be established by the
 MOUNT command, but the actual change of the fileset-ID (from the default of
 FOO) does not take place until the first record is written to the tape. 

 The command

	>MOUNT/OVERRIDE:SET_IDENTIFICATION MM0: (FOO,BAR,MORE)

 mounts a tape set whose fileset-ID is immaterial and that consists of three
 physical reels with volume-IDs of FOO, BAR, and MORE.  The reel FOO must be
 loaded on device MM0:, but the other two reels are not loaded at the time of
 the mount. 

 The following command

	>MOUNT MM0: FOO /VOLUMEID=(A312,A387,B231)

 mounts a tape set whose fileset-ID is FOO and that consists of three physical
 reels with volume-IDs A312,A387, and B231. The reel A312 must be loaded on
 device MM0:, but the other two reels are not loaded at the time of the mount. 

 The following command

	>MOUNT (MM0:,MM1:,MM2:) (FOO,BAR,MORE)

 mounts a tape set whose fileset-ID is FOO and that consists of three physical
 reels with volume-IDs FOO, BAR, and MORE. At the time of the mount, the reel
 FOO must be loaded on device MM0:, the reel BAR must be loaded on device MM1:,
 and the reel MORE must be loaded on device MM2:. 

 There is no theoretical limit to the number of physical tape reels in
 a set, but your DCL MOUNT command must translate to an MCR MOU command
 of 80 characters or fewer.  There are, therefore, mounts that are
 permitted by the system, but that cannot be translated successfully
 from DCL to MCR within that limit.  This means that in those cases,
 you cannot use the DCL MOUNT command, but must use the MCR MOU.  
2 ACP
#PROCESSOR
2 UNIQUE
#PROCESSOR
2 PROCESSOR
 MOUNT/PROCESSOR:arg ddnn: volumelabel
    	         acpname
	         UNIQUE

 Specifies the name of the ACP  you wish to use to support file activity on 
 the volume.  In most cases, you can use the default ACP. The default ACP 
 depends on the the device type.  You only have to specify an ACP in special 
 cases.  If an ACP has been written for a custom application in your 
 installation, you will need to use that ACP for volumes used by that 
 application.  You will also have to include the /FOREIGN qualifier in this 
 case.  You may also need to use the /PARAMETERS qualifier to enter parameters 
 used by that ACP.

 The UNIQUE argument specifies that a dedicated ACP is to be used for the 
 volume being mounted.  MOUNT creates a copy of the F11ACP if the device is a 
 disk or DECtape, or of the MTAACP, if the device is a magtape.  This unique 
 ACP will be given a name  of the form ddnnF1  or ddnnAP.  When the volume is 
 dismounted and the file  processor exits, the ACP is automatically removed. On
 RSX-11M-PLUS only, if  the ACP (F11ACP or MTAACP) is installed in secondary
 pool, /PROCESSOR:UNIQUE  is the default. If you specify the UNIQUE argument
 naming a foreign ACP, that  ACP is created and dedicated to your volume.  If
 you name a foreign ACP, you  need the /FOREIGN qualifier.  You may also need
 the /PARAMETERS qualifier. 

 You cannot name an ACP with the UNIQUE argument.  The documentation is in
 error.
2 DENSITY

 MOUNT/DENSITY:arg ddnn:[,ddnn:...] fileset-ID
	       800 
	       1600
               6250
	       LOW
	       HIGH

 The /DENSITY qualifier specifies the density at which a magnetic tape
 is to be written.

 If the specified tape unit does not support the density given, the 
 command is rejected.  
2 EXTENSION

 MOUNT/EXTENSION:n ddnn: volumelabel

 The /EXTENSION qualifier specifies the default number of blocks by
 which a file will be extended when it has exhausted its allotted space.

 The default is whatever value was specified when the volume was initia-
 lized. This qualifier may be used to override the initialization value.
2 FILE_CONTROL_BLOCKS
#ACCESSED
2 ACCESSED

 MOUNT/ACCESSED:n ddnn: volumelabel

 Specifies the approximate number of directories that will be accessed
 simultaneously during the mount.  Legal values for n range from 1
 through 127.  F11ACP maintains a list of most recently used
 directories.  The value specified for /ACCESSED sets the number of
 entries in this list.  In general, directory operations can be
 significantly speeded up by increasing this value.  If a directory
 appears in the list, no disk I/O is required to find the directroy in
 the MFD.  In addition, directory operations take place without the
 necessity of reading the directory file header.  If this qualifier is
 not explicitly stated, the default is the value specified at the time
 the volume was initialized.  Note that increasing the /ACCESSED value
 increases the amount of system pool used. 
2 FOREIGN

 MOUNT/FOREIGN ddnn:

 Specifies that the volume being mounted is not in Files-11 format.
 Such volumes are called foreign volumes.  Note that before a disk or
 tape has been initialized, it is a foreign volume. This qualifier
 functions slightly differently on RSX-11M and RSX-11M-PLUS. 

 On RSX-11M, /FOREIGN is recommended, but not required when using foreign
 volumes.  If you don't mount the volume, access to the volume is unrestricted.
 If you mount a foreign volume /FOREIGN, no one  else can access it.  If you
 include /FOREIGN when mounting  the foreign volume /SHAREABLE, then other
 users must also mount the volume to access it. 

 On RSX-11M-PLUS, all volumes must be mounted.  This qualifier is required for 
 mounting foreign volumes.  

 Since a foreign format is unknown to the system, no label is specified
 on the command line.
2 NOUNLOAD
#DEFAULT
2 EXPIRATION_DATE
#OVERRIDE
2 IDENTIFICATION
#OVERRIDE
2 OVERRIDE
 MOUNT/OVERRIDE:EXPIRATION_DATE	ddnn: volumelabel
		IDENTIFICATION	ddnn:

 The /OVERRIDE:EXPIRATION_DATE qualifier allows you to override the
 expiration date of an ANSI standard magtape.

 The /OVERRIDE:IDENTIFICATION qualifier allows you to mount a Files-11
 volume without specifying a volume identification. This is a privileged
 option.
2 OWNER
 MOUNT/OWNER:[g,m] ddnn: volumelabel

 Specifies the owner of the volume.  The brackets are required syntax.  
 Inclusion of this qualifier overrides the OWNER value established when 
 the volume was initialized.

 The /OWNER interacts with the protection established for the file and the 
 volume.  See HELP MOUNT PROTECTION and HELP MOUNT FILE_PROTECTION.
2 PARAMETERS
 MOUNT/FOREIGN/ACP:acpname/PARAMETERS:"user parameters" ddnn: volumelabel

 Enables you to enter commands to an ACP that is not DIGITAL standard.  A
 maximum of 40 characters enclosed in quotation marks can be passed to a
 foreign ACP.  This qualifier is valid on RSX-11M systems only with the 
 /ACP qualifier.  The /FOREIGN qualifier is recommended in this case for 
 RSX-11M systems and required for RSX-11M-PLUS systems.
2 FILE_PROTECTION
 MOUNT/FILE_PROTECTION:(code) ddnn: volumelabel

 Specifies the default file protection for any new files created on the 
 volume while it is mounted.  The /FILE_PROTECTION qualifier combines with
 /OWNER to control access to files.  The file-protection code is enclosed in 
 parentheses in the form (SYSTEM:RWED,OWNER:RWED,GROUP:RWED,WORLD:R) where

	R means allow read access to file
	W means allow write access to file
	E means allow file to be extended
	D means allow file to be deleted

 See also HELP MOUNT PROTECTION for information on volume protection.

 The default file protection  can be overridden by specifying another 
 protection when the file is created.  If this qualifier is not included, 
 the value specified at the time the volume was initialized is applied.  

 For ANSI magtapes, this qualifier specifies the protection applied to 
 the volume.  See the RSX-11M/M-PLUS I/O Operations Manual for further 
 information on the translation from this coding to ANSI label coding.
2 PROTECTION
 MOUNT/PROTECTION:(code) ddnn: volumelabel

 Specifies the volume protection for Files-11 disks.  This protection
 overrides the volume protection established when the volume was
 initialized.  The /PROTECTION qualifier combines with the /OWNER
 qualifier to control access to the volume.  

 The file-protection code is enclosed in parentheses in the form 
 (SYSTEM:RWED,OWNER:RWED,GROUP:RWED,WORLD:R) where

	R means allow read access to file
	W means allow write access to file
	E means allow file to be extended
	D means allow file to be deleted

 See also HELP MOUNT FILE_PROTECTION for information on setting the 
 default protection for new files created on the volume while mounted.
2 SHOW
 MOUNT/SHOW ddnn: volumelabel

 The /SHOW qualifier specifies that volume information for the volume
 being mounted be displayed on the entering terminal.
 Here is the display format for disks and other random-addressable 
 devices:

	Volume Information
	Class:	      Files-11 or Foreign
	Device:	      ddnn:
	Volume label: label
	Pack Serial:  serial number supplied by manufacturer
	Owner:        [g,m]	(volume owner, override with /OWNER)
	Protection:   code	(volume protection)
	Default:      code	(default file protection)
	Processor:    acpname

 The information displayed by /SHOW is similar for magtapes.  If 
 multiple tape volumes are being mounted, the device and volume label 
 information is repeated for each volume. The Protection and Default 
 fields are omitted from the volume information for magtapes.
2 UNLOAD
#DEFAULT
2 DEFAULT
 MOUNT/DEFAULT:arg ddnn: volumelabel
	       SAVE
	       NOUNLOAD
	       UNLOAD

 This qualifier is for RSX-11M-PLUS systems only.  It applies to DB:, 
 DM: and DU: devices only.

 Specifies the default that will apply when the volume is dismounted.
 SAVE is a privileged argument and specifies that the medium is not
 unloaded and can be accessed for reads and writes by privileged tasks.
 UNLOAD specifies that the medium is to be unloaded after the
 dismount.  This is the default for Files-11 volumes.  NOUNLOAD
 specifies that the medium is not to be unloaded.  This is the default
 for foreign volumes.  Remember, these values can also be set when you issue 
 the DISMOUNT command.  See also HELP DISMOUNT.
2 UNLOCK

 MOUNT/UNLOCK ddnn: volumelabel

 Specifies that the volume index file, [0,0]INDEXF.SYS, is unlocked.  
 This means the file can be read and written to.  Normally, this file 
 is locked and can be read only.

 This qualifier has nothing to do with hardware or software writelocking.
 Its main use is in conjunction with VFY, the File Structure Verification
 Utility.
2 WINDOWS
 MOUNT/WINDOWS:arg ddnn: volumelabel
	       n
	       FULL
	       (USER:n,INDEX:n)

 The /WINDOWS qualifier specifies the number of mapping pointers to be
 allocated for file windows. A file window consists of a number of
 mapping pointers; it is stored in memory when the file is opened.

 The argument n specifies a default for all files opened on the volume. n
 can be from 1 through 129.

 The USER and INDEX arguments can be combined or specified singly.  USER:n
 specifies the user default value for the volume.  INDEX:n specifies the
 number of pointers to allocate to the index file window.  The argument FULL
 specifies that you want windows created that map as much of the file as 
 possible.  FULL can also replace n for USER and INDEX.

 The default value is set when the volume is initialized. This qualifer
 may be used to override the initialization default.
2 SYSTEM
#PUBLIC
2 PUBLIC
 MOUNT/PUBLIC ddnn: volumelabel
 MOUNT/SYSTEM ddnn: volumelabel

 These two qualifiers are synonyms.  They are privileged.  Specifies that the 
 mounted volume be available to all users who are allowed access under the 
 volume-protection and file-protection codes established for the volume when 
 mounted.  

 If you state this qualifier explicitly when mounting a volume on an 
 allocated (private) device, the device is automatically deallocated 
 and set public, if necessary.

 If you do not state this qualifier explicitly, and the device is 
 already set public, the mount will default to /PUBLIC.  

 See also HELP MOUNT SHAREABLE, HELP ALLOCATE, and HELP SET DEVICE.
2 NOSHAREABLE
#SHAREABLE
2 SHAREABLE
 MOUNT/[NO]SHAREABLE ddnn: volumelabel

 Specifies whether the volume is to be mounted shareable.  A volume mounted 
 /SHAREABLE can be mounted multiple times by the same or different users.  
 Each user's access is determined by the volume-protection and
 file-protection codes established for the volume when mounted.

 If you mount the volume /SHAREABLE and the device is allocated or set 
 public, the device is automatically deallocated or set nonpublic.

 A volume mounted /NOSHAREABLE is dedicated for your private use.  No 
 other user can access the volume.  For Files-11 volumes mounted 
 /NOSHAREABLE, your privileges are SYSTEM privileges.  

 If you specify /NOSHAREABLE explicitly when mounting a volume on an
 device, the device is automatically allocated and set nonpublic, if
 necessary.  If the device is already allocated, the mount defaults to 
 /NOSHAREABLE. If the device is not allocated or set public, the 
 default is /SHAREABLE.  If the device is set public, the default is 
 /PUBLIC (Synonym: /SYSTEM).  

 See also HELP MOUNT PUBLIC, HELP ALLOCATE and HELP SET DEVICE.
2 NOWAIT
#WAIT
2 WAIT
 MOUNT/[NO]WAIT ddnn: volumelabel

 Specifies whether you require operator assistance in performing the
 mount.  The main use of this qualifier is for batch jobs,  indirect
 command files, or terminals distant from the machine room.  The
 default is /WAIT for mounts in batch jobs and indirect command files,
 and /NOWAIT for interactive mounts.  If the mount is included in a
 batch job or indirect command file, or if you specify /WAIT in an
 interactive mount, a message concerning the mount is sent to the
 operator's console and the mount is not completed until the operator
 takes action.  If you specify /NOWAIT in a batch job or indirect
 command file, or if the mount is interactive, no message appears.  The
 medium must have been previously placed on the device and readied for
 access (spun up/on-line).  Batch processing is available on RSX-11M-PLUS 
 systems only.  
2 NOWRITE
#WRITE
2 WRITE
 MOUNT/[NO]WRITE ddnn: volumelabel

 Specifies whether the volume is to be write-protected.  The 
 default is /WRITE.  If /WRITE is specified or implied, the volume can 
 be written to as permitted by the volume-protection and 
 file-protection codes established for the volume when mounted.  

 If /NOWRITE is specified, no one may write to the volume.
2 VOLUME
 MOUNT/VOLUME:(volumeID[,volumeID[s]) 

 Specifies volume identifiers.  If you wish to check volume-IDs, you
 must specify this qualifier.  

 If, for magtapes, the fileset-ID is not the same as the volume-ID of the 
 first tape in the set, you must use this qualifier and include all 
 volume-IDs in the set.  

 See HELP MOUNT MAGTAPE EXAMPLES.
2 FORTRAN
#CARRIAGE_CONTROL
2 LIST
#CARRIAGE_CONTROL
2 CARRIAGE_CONTROL
 MOUNT/CARRIAGE_CONTROL:arg ddnn:[,ddnn:...] fileset-ID
		        FORTRAN
		        LIST
		        NONE

 Specifies the record type for an unlabelled tape.  The arguments 
 correspond to the FORTRAN keywords for the OPEN statement.  This 
 qualifier also works on ANSI Level 1 or 2 magtapes, that is, those 
 without HDR2 records (labels).  This qualifier also works for ANSI 
 Level 3 magtates that do not have a system code (HDR1 CP 61) beginning 
 in DEC or OS.
2 BLOCK_SIZE
 MOUNT/BLOCK_SIZE:n ddnn:[,ddnn:...] fileset-ID

 Specifies the block size in characters for unlabelled magtapes at the
 time of the mount.  Values for n can be from 18 through 16000.  This 
 qualifier also works on ANSI Level 1 or 2 magtapes, that is, those 
 without HDR2 records (labels).
2 NOHDR3
#HDR3
2 HDR3
 MOUNT/[NO]HDR3 ddnn:[,ddnn:...] fileset-ID

 Specifies whether an HDR3 label is to be written when creating new files.  
 The /NOHDR3 qualifier is needed only in the situation where it is known 
 that the target system cannot handle a tape with an HDR3 label.  This 
 qualifier has no other effect or application. The default is /HDR3. 
2 NOLABEL
#LABEL
2 LABEL
 MOUNT/[NO]LABEL ddnn:[,ddnn:...] fileset-ID

 Specifies whether the tape volume is ANSI or unlabelled.  An ANSI tape 
 is specified by the /LABEL qualifier.  This is the default.  An 
 unlabelled tape is specified by the /NOLABEL qualifier.
2 RECORD_SIZE
 MOUNT/RECORD_SIZE:n ddnn:[,ddnn:...] fileset-ID

 Specifies the record size in characters for unlabelled magtape.  The 
 value for n can be from 1 through the value for blocksize on the 
 volume.
2 EBCDIC
#TRANSLATE
2 UT1
#TRANSLATE
2 UT2
#TRANSLATE
2 UT3
#TRANSLATE
2 TRANSLATE
 MOUNT/TRANSLATE:arg ddnn:[,ddnn:...] fileset-ID
	        NONE
	        UT1
	        UT2
	        UT3

 Specifies the character translation to take place for reading from and
 writing to the mounted unlabelled tape volume.  NONE specifies no
 translation, and is the default.  EBCDIC specifies translation to
 ASCII from EBCDIC for writes and EBCDIC to ASCII for reads.  Note that
 the translation is not one-to-one because some characters are found
 only in EBCDIC or only in ASCII.  UT1, UT2, or UT3 specify
 user-supplied translation tables that have been previously linked into
 the MTAACP.  See the RSX-11M/M-PLUS I/O Operations Manual for further
 information on character translation. 
2 ACCESSIBILITY
#OVERRIDE
2 EXPIRATION_DATE
#OVERRIDE
2 IDENTIFICATION
#OVERRIDE
2 SET_IDENTIFICATION
#OVERRIDE
2 OVERRIDE
 Mounting Disks or other Files-11 Volumes

 MOUNT/OVERRIDE:IDENTIFICATION ddnn: volumelabel 

 Mounting Magtapes

 MOUNT/OVERRIDE:(arg[,arg[s]) ddnn:[,ddnn:...] fileset-ID
	  ACCESSIBILITY
	  EXPIRATION_DATE
	  IDENTIFICATION
	  SET_IDENTIFICATION

 This is a privileged qualifier.

 /OVERRIDE:IDENTIFICATION allows privileged users to mount a volume without 
 using the volume label (or the fileset ID for magtape).  

 For magnetic tapes, /OVERRIDE specifies that you wish to override one or more 
 characteristics of a tape volume that are normally checked when you mount a 
 magtape.  The parentheses are optional if you wish to specify only one 
 argument.  If you wish to specify more than one argument, the arguments must 
 be enclosed in parentheses and separated by commas. The ACCESSIBILITY 
 argument specifies that you wish to override the protection on ANSI magtapes.
 The EXPIRATION_DATE argument specifies that you wish to override the 
 expiration date on ANSI magtapes.  The IDENTIFICATION argument specifies that 
 you wish to mount the tape or tape set without specifying a fileset-ID.  By 
 default, the fileset-ID is the volume-ID of the first tape reel in the set.  
 The SET_IDENTIFICATION argument specifies that you wish to mount a tape or 
 tape set that does not follow ANSI standard.  This argument is not otherwise 
 needed.
