DIGITAL RESEARCH(r) CP/M Plus TM (CP/M Version 3) Operating ...

1.4 How to Copy Your CP/M 3 Disks CP/M 3 User's Guide
Data processing professionals avoid losing programs and data by making copies of
valuable files. Always make a working copy of any new program that you purchase
and save the original. If the program is accidentally erased from the working copy,
you can easily restore it from the original.
It is also wise to make frequent copies of new programs or data files as you
develop them. The frequency of making copies varies with each programmer. However,
as a general rule, make a copy at the point where it takes ten to twenty times
longer to reenter the information than it takes to make the copy.
So far, we have not discussed any commands that change information recorded on
your CP/M 3 system disk. Before we do, make a few working copies of the your
distribution disks.
1.4 How to Make Copies of Your CP/M 3 Disks
To back up your CP/M 3 disks, you need two or more floppy disks for the backups.
The back-up disks can be new or used. You might want to format new, or
reformat used disks with the disk formatting program that accompanies your particular
computer. If the disks are used, be sure that there are no other files on the disks.
If your computer's manufacturer has provided a special program to copy disks,
you might use it to make back-ups of your distribution disks. Otherwise, use the
COPYSYS and PIP utility programs found on your CP/M 3 distribution disks. PIP
can copy all program and data files, but only COPYSYS can copy the operating
system. Note that the COPYSYS utility distributed by Digital Resarch only functions
with eight-inch, single-density drives. However, your computer's manufacturer
might have modified COPYSYS to work with your equipment.
This section shows how to make distribution disk back-ups on a system that has
two drives: drive A and drive B. Your drives might be named with other letters from
the range A through P. To make a copy of your CP/M 3 distribution system disk,
labeled 1 of 2, first use the COPYSYS utility to copy the operating system loader.
Make sure that your distribution system disk is in drive A, the default drive, and the
blank disk is in drive B. Then enter the following command at the system prompt:
A >COPYSYS
1-5