/REPLACE
       /NOREPLACE (default)

    Controls whether an existing FAT file is deleted before the new
    file is copied to the target FAT directory.

 EFI$CP> COPY SYS$UPDATE:VMS_LOADER.EFI EFI:\EFI\VMS\VMS_LOADER.EFI
 EFI$CP> COPY/ASCII EFI:\STREAM_LF_FILE.TXT SYS$LOGIN:FOO.TXT

 EFI$CP> COPY SYS$SCRATCH:VMSFILE.COM FOO:\EFI\
 %EFI-W-INCOMPATFAT, record organization or file structure not supported by FAT
 EFI$CP>

 EFI$CP> copy/error=exit xxx.dat efi:\efi
 %EFI-E-NOTFOUND, specified file or directory was not found
 $