Copy-Backing Up One File - IBM 5150 Manual To Operations

COPY-Backing Up One File
Sometimes you will find it useful to copy only one file.
You might want to copy one file instead of a whole
diskette when:
• Only one file of a whole diskette has been changed
and needs to be backed up.
• You want to make extensive changes to a file or
when you're not too sure of the effect of the
changes. It is safer to change a copy of the file
rather than the original.
• You want to build a new file based on the contents
of an "old" file-similar to copying a letter and
then marking up the copy to make a new letter.
• You need two copies of a file. For example, if you
want to give a program you wrote to a friend,
you'd probably want to give a copy of the program
and not your original program.
Let's use some diagrams to illustrate the various
possibilities with COPY.
Assume that two of the files on the original diskette are
LJCORS and DIARY, and that the file to be copied is
LJCORS.
• The file (LJCORS) is copied to another diskette
and the name is the same on both diskettes:
Original
Back-up
JUCORSI
DOS 3-65