 
 BCK copies standard RMS-11 files from one medium to another (disk-to-disk
 or disk-to-tape), translating the data into a special backup format.  The
 backup copy contains the source file's attributes:  account number, creation
 and revision dates, protection code, and so on.  However, the attributes do
 not include placement control instructions; a file cannot be restored to the
 same physical place on a device that it was backed up from.
 
 backup files can only be accessed properly by the RST utility (type HELP RST
 for more information).  User programs cannot change backup data.
 
 BCK uses only magnetic tapes with ANSI-standard labels.  However, the backup
 data written by BCK between the labels may not comply with ANSI standards.

 To invoke installed BCK:

	BCK[command string]

 To invoke uninstalled BCK:

	RUN $RMSBCK
 
 Type HELP BCK COMMAND for an explanation of BCK's command line and switches.
 
 See the RMS-11 User's Guide for more information.

2 COMMAND
 
 The general form of BCK's command line is:
 
	outfile[/switch...]=infile[/switch...][,infile[/switch...]...]
 
 outfile - the filespec of a backup file.  If the backup medium
           is disk, file name and extension must be *[.*].  If the
	   backup medium is magtape, all backup files will be in
	   a container file, which must be specified explicitly.

 infile  - the filespec of a disk file from which the backup copy
	   is to be created.  Wild cards are allowed.

 Switches:
 	 
 Type		Format		   Description			Default
 
 String 	?		   Print HELP message		No help
		HELP
 
 Global		/ID		   Identify current version	No id
 
	        /[NO]QU 	   Enable/disable query mode	/QU
 
                /SL[:filespec]	   Provide summary listing	No summary
			   	   (in file, if specified)
 
 Outfile	/RA		   Read after writing		No reading
 
 		/RC		   Check after writing		No checking
 
 		/RW		   Rewind magtape before	No rewinding
				   writing
 
 		/SU	   	   Supersede old files		No supersede
 
 Infile		/CD:date[:v]	   backup files based on	No date
			   	   creation date		checking
		 
	  	/RD:date[:v]	   backup files based on	No date 
				   revision date		checking
 
 where:
	date - dd-mon-yy

	v    - not specified - created/revised on the specified date
	       A - created/revised after the specified date
	       B - created/revised before the specified date

