BACKUP      Creates a BACKUP copy of the current data
            contained on your hard disk.

Format:     BACKUP SD:/Path[FileSpec] DestD: [Switches]


   /S backs up files on BOTH the specified or current
      directory and ALL sub-directories.

   /M backs up ONLY the files that have been modified
      since the last BACKUP operation (including files
      with ARCHIVE bit set by ATTRIB +A command).

   /A appends/adds the files to an existing set of
      BACKUP diskettes. (Prevents over-writing files.)


   /D:mm-dd-yy  similiar to /M, but backs up ONLY
      those files modified on, or after, the specified
      DATE.

   /T:hh:mm:ss  backs up ONLY those files modified on,
      or after, the specified TIME. (MUST be used in
      conjunction with the DATE switch.)

   /F FORMATS the target diskette(s) if it has not
      already been formatted. (DOS V3.3 only.)

   /L:[LogFileSpec] Creates a log file that is named
      according to the LogFileSpec entered. Defaults
      to a file name of \BACKUP.LOG.


Example:    BACKUP C:\ A:

  Backs up ALL files contained in the ROOT directory
  of drive C. (Will NOT backup any files contained in
  sub-directories of the specified directory. If the
  Source Directory is omitted will default to the
  CURRENT directory.)


Example:    BACKUP C:\ A: /S

  Backs up ALL files contained in the ROOT directory
  AND sub-directories of drive C. (Performs a BACKUP
  of the ENTIRE contents of drive C.)


Example:    BACKUP D:\ A: /S/M

  Backs up ALL files contained on drive D: (including
  those in sub-directories) that have been MODIFIED
  since the last BACKUP. Requires using a NEW set of
  BACKUP diskettes.


Example:    BACKUP D:\ A: /S/M/A

  Same as preceding example, but APPENDS/ADDS the
  files that have been MODIFIED to an EXISTING set
  of BACKUP diskettes. (Insert LAST diskette used.)


Example:    BACKUP D:\123 A: /S

  Backs up ALL files contained in the D:\123 directory
  (including all D:\123 sub-directories).

Example:    BACKUP D:\123 A: /S/M/A/D:04-15-90

  APPENDS/ADDS the files in the D:\123 directory and
  its sub-directories that were MODIFIED on, or after,
  15 April 1990 to an EXISTING set of D:\123 BACKUP
  diskettes. (Insert * LAST * D:\123 BACKUP Diskette.)

[*]   Normally the Target DRIVE for BACKUP will be
  drive A: for placing BACKUP copies onto diskette(s).
  However, hard disks can be used to receive BACKUPs.
  Such hard disk backup files will be stored on the
  TARGET hard disk in a sub-directory named \BACKUP.

[*]   Backups prepared using DOS Version 3.3 can NOT
  be restored to another computer using an earlier DOS
  version unless the system has been "booted" using a
  DOS system diskette of version 3.3 or later.
