CVL - CHANGE VOLUME LABEL
		=========================
 
		      Users' Guide
		      ============

 CVL  is  a  mini-utility which will allow an RSX11M user to view disk
 initialization  parameters  not  displayed  via the /VI switch of the
 MOUNT command, and to reset certain critical parameters.
 
	The command line is   CVL  DDn:newname/SW1/SW2/....
 
 where  newname is the newname for the volume and /SW is any of
 
     /VI             Display volume information but change nothing.
     /LRU    = NN    Change the LRU for the volume to NN.
     /MAXEXT = NN    Change the MAXEXT for the volume to NN.
     /MXF    = NNNN  Increase  the maximum number of files  allowed on
                     the volume to NNNN.
     /WINDOW = NN    Change   the  default  window  pointers  for  the
                     volume.
     /FPRO   = [RWED,RWED,RWED,RWED]  where  any  of  RWED  used  sets
                     READ,  WRITE,  EXTEND,  or  DELETE privileges for
                     SYSTEM, OWNER, GROUP, and WORLD, respectively.
 
 Note  that  in all cases, NN (NNNN) is a decimal value, the user must
 be  privileged  and  the  volume  must  be mounted. Also as an aid in
 recordkeeping, the date the volume was initialized is displayed.
 The  maximum number of files that you can specify depends on the size
 of  the File Header bitmap in the Index File (which cannot be changed
 without  re-initializing  the disk) and is always a multiple of 4096.
 If  the  value  specified  is  larger  than that, or is less than the
 current number of files, CVL returns an error message.

 Note also that, except when /VI is used, the label is always modified.


 CVL can return the following error messages:-

 1.  CVL - PRIVILEGE VIOLATION

     A user must be privileged before he may use CVL.

 2.  CVL - SYNTAX ERROR

     CVL detected a syntax error in the commandline specified.

 3.  CVL - INVALID DEVICE

     The device specified was not a valid Files-11 device.

 4.  CVL - DEVICE NOT MOUNTED

     CVL can only act on mounted disks.

 5.  CVL - HEADER BLOCK READ ERROR n

     CVL detected an error when trying to read the disk header block.

 6.  CVL - HEADER BLOCK WRITE ERROR n

     CVL detected an error when trying to rewrite the disk header block.

 7.  CVL - ILLEGAL SWITCH VALUE

     One of the switches in the commandline contained an illegal value.

 8.  CVL - NON NUMERIC INPUT CHARACTER

     One of the switches that takes a numeric value was specified with
     a non-numeric value.