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DOS Batch File  |  1994-02-25  |  141b  |  10 lines
  1. a:
  2. if not exist b:backup goto a
  3. diskcopy a: b:
  4. ren b:back.bat b:backup
  5. REM BACKUP COMPLETE 
  6. goto c
  7. :a
  8. rem wrong disk in drive b:
  9. :c
  10.