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01 TMOUNT
! TMOUNT.HLP -- Created by RUNOFF 17 Aug 84 11:27:01
! Written: 12-Jul-82/SLP from ??
! Updated:  9-Nov-82/SLP
 TMOUNT is a special command to help  you  mount  a  tape  on  the  VAX.
 TMOUNT  interactively  asks  you  for  all the information necessary to
 allocate  a  VAX  tape  drive,  mount  your  tape,  and,  if  required,
 initialize your tape.

 When you finish with your tape, you can use the  TDISMOUNT  command  to
 dismount your tape and deallocate the drive.

 TMOUNT and TDISMOUNT thus make mounting and dismounting magnetic  tapes
 on  the  VAX similar to mounting and dismounting tapes on the DEC-10 --
 very easy!
02 Parameters
 TMOUNT needs to know which tape you want mounted, plus a  little  bit
 about the format of the tape.

 The format of the TMOUNT command is

   TMOUNT [volume_label [tape_format [write_status [density]]]]

 where the four parameters are optional.  TMOUNT will prompt  you  for
 the  parameters  you  don't  specify.  TMOUNT also (re)prompts if you
 give an invalid value to a parameter.

 Most users prefer to let TMOUNT prompt them for the parameters.   The
 prompt  will include a list of valid responses (shown in parentheses)
 and the default response [shown in brackets] assumed when  you  press
 RETURN without specifying a value for the parameter.
03 Volume_Label
 Prompt:
   What is the volume label (reel id) of the tape to mount?

 This parameter specifies the volume label (reel identification)  of
 the  tape you want mounted.  It is the number of your tape (if your
 tape is a rental tape) or the name of your  private  tape.   TMOUNT
 does not validate this parameter, except to insure it is non-blank,
 has six or fewer characters, and does not contain an embedded space
 or tab.

 The operator uses the volume label to locate your tape on the  tape
 rack.   He  looks  for  the  matching EXTERNAL label affixed to the
 outside collar of your tape.

 ANSI tapes also have an INTERNAL label  (written  on  the  magnetic
 tape  itself).  When the tape is mounted, the computer will further
 check that the volume label you specify matches the internal label.
 This is a safeguard to insure that the proper tape was mounted.
03 Tape_Format
 Prompt:
   Are you mounting an ANSI (VAX), FOREIGN (unlabelled),
   or DEC-10 BACKUP format tape?  (A, F, D) [A]:

 This parameter indicates the type (format)  of  your  tape.   Valid
 choices are ANSI, FOREIGN, and DEC-10_BACKUP.  The default is ANSI.
 You only need to specify the first letter (A, F, or D).
04 ANSI
 The tape is (to be) an ANSI labelled tape.  This is the  standard
 format  used  by  the VAX/VMS operating system.  The tape will be
 mounted with a logical name of "TAPE".

 If the tape needs to be initialized (because it is blank),  mount
 the tape write-enabled (see write_status parameter).

 You can use the COPY command to transfer files  to  and  from  an
 ANSI tape.
04 FOREIGN
 The tape is not an ANSI labelled tape or a  DEC-10  BACKUP  tape.
 It  will  be  mounted  with a logical name of "TAPE".  Tapes from
 another computer usually need to be mounted FOREIGN.  You can use
 the TAPECOPY program to transfer files to and from such a tape.

 Tapes to be used with the VAX BACKUP  utility  also  need  to  be
 mounted FOREIGN.
04 DEC-10_BACKUP
 The tape is a DEC-10 BACKUP (or DEC-20 DUMPER)  tape.   The  tape
 will   be   mounted   with  a  logical  name  of  "DUMPER".   The
 write_status and density parameters, if you specified  them,  are
 ignored.  They are automatically set to write-locked and 800 BPI,
 respectively.

 Use the DUMPER utility on the VAX to read files off of  a  DEC-10
 BACKUP  tape.   (Type  HELP  DUMPER at DCL command level for more
 information about DUMPER.)
03 Write_Status
 Prompt:
   Do you want your tape WRITE ENABLED?  (Y/W, N) [N]:

 This parameter indicates whether or not you want  to  write  (copy)
 new  files on to the tape.  The valid choices are YES or WRITE (you
 want to write on the tape) and NO or NOWRITE (you only want to read
 from  the  tape).  The default is NO.  You only need to specify the
 first letter (Y, W or N).

 If you write-enable an ANSI tape, you will be asked if you want  to
 initialize the tape.

 (No prompt for DEC-10 BACKUP tapes.  write_status is  automatically
 set to write-locked.)
04 Initialize
 Prompts:
   Does this tape need to be initialized?  (probably not!)
   In general, you only need to initialize a tape if it's blank.
   Initialize?  (Y, N) [N]:

 Further prompt, if confirmation needed:

   WARNING: Initialization will effectively ERASE your tape!
   Confirm: Do you REALLY want this tape initialized? (Y, N) [N]:


 If you write-enable an ANSI tape, TMOUNT will ask if you need  it
 initialized.

 It is necessary to initialize an ANSI tape before you  can  write
 on  it  for  the  first time.  Among other things, initialization
 writes the internal label on the tape.   You  only  initialize  a
 tape once.

 If the tape has been initialized previously, you  don't  want  to
 initialize  it again.  Initialization makes any existing files on
 the tape inaccessable,  effectively  erasing  your  tape.   Don't
 initialize a non-blank tape unless you intentionally WANT TO LOSE
 all files written previously on the tape.

 TMOUNT  gives  you  two  chances  to  back  out  before  it  will
 initialize your tape.
03 Density
 Prompt:
   Your tape's BPI density (800, 1600, 6250) [1600]:

 This parameter specifies the BPI (bits/bytes  per  inch)  recording
 density  of  your tape.  The valid choices are 800, 1600, and 6250.
 The default is 1600 BPI.

 This parameter is optional for write-locked tapes, since  the  tape
 drive  will automatically detect the density of data written on the
 tape previously.  For write-enabled tapes, you should  specify  the
 density you want to use.

 (No prompt for DEC-10 BACKUP tapes.  Density is  automatically  set
 to 800 BPI.)
02 Examples
 In these examples, all the TMOUNT parameters are given on the  TMOUNT
 command line;  prompt mode is not invoked.  However, the values shown
 for the parameters are equally valid as reponses in prompt mode.  The
 tape_format and write_status parameter values can be abbreviated to a
 single letter;  they are spelled  out  in  full  in  these  examples.
 (Note:  the $ dollar sign is the DCL prompt.)

 $ TMOUNT 245 DEC-10

      This command shows how to mount a DEC-10 BACKUP tape.  The  reel
      id  of  the  tape  is  245.   You  don't specify write_status or
      density.  (They are ignored if you do.) Use the  DUMPER  command
      to copy files from the tape to your disk area.

 $ TMOUNT 901 ANSI NOWRITE

      This command shows how to  mount  an  ANSI  tape  (the  standard
      VAX/VMS  format)  containing files that you want to copy to your
      disk area.  901 = volume label, ANSI = ANSI  format,  NOWRITE  =
      write-locked.   (Density  defaults to whatever the density is on
      the tape.) You can use the DIRECTORY command to  see  what's  on
      the  tape.   Use  the  COPY command to copy files on the tape to
      your disk area.

 $ TMOUNT MYTAPE FOREIGN NOWRITE

      This command shows how to mount a tape  from  another  computer.
      The  name  of the tape in this example is "MYTAPE".  You can use
      the TAPECOPY command to copy files from the tape  to  your  disk
      area.

 $ TMOUNT 855 FOREIGN WRITE 6250

      This example shows how you could mount tape  855,  intending  to
      archive  files on your disk area to the tape with the VAX Backup
      Utility.  The tape will be set to write at  a  density  of  6250
      BPI.

 $ TMOUNT 836 ANSI WRITE 1600

      This command shows how to mount tape 836 so you could copy files
      on  to  it  with  the  COPY  command.  Data will be written at a
      density of 1600 BPI.