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1989-12-06
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5KB
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133 lines
DISKDUP Users Guide
Back in the old days when you wanted to make a copy of a
disk, all you had to do was put it in the drive and use
diskcopy. There was no muss or fuss. Even machines with
only 512k could make a copy of a 360k disk in a single pass.
Today, it is a different story. With the introduction of the
PC/AT we started using high capacity disks that would hold
1.2 megabytes of information. With the PS/2 machines we use
720k and 1.44 megabyte 3.5 inch floppies.
Alas, we are still using the same old diskcopy. It now takes
SEVERAL passes to copy a single disk (unless you have two of
the high capacity drives). The situation becomes even worse
if you want to make multiple copies of a single disk. I
quickly tired of this floppy shuffle, so I wrote DISKDUP
(pronounced disk dupe, as in duplicate).
DISKDUP performs the same functions that diskcopy does, but
it eliminates all of the disk swapping. How does it work you
ask? Simple, almost everyone has a hard disk. I just use
the hard disk for virtual memory. Not only does this
eliminate the disk swapping, it also allows making multiple
copies of a disk with a single read pass. Of course the hard
disk is left in the same condition in which it was found.
All of the temporary files are removed from the hard disk at
the end of the copy session.
DISKDUP also adds a couple more extras:
o An on screen display keeps you informed at all stages of
the copy.
o Optional verification after each write operation with the
/v switch.
USAGE: DISKDUP <floppy disk> <hard disk> [ /v ]
EXAMPLE: DISKDUP A: C:
DISKDUP requires the floppy drive letter to be either A or B.
Some systems with an add-on 3.5 inch drive access them
through a DRIVER.SYS entry in the CONFIG.SYS file. In this
case you would normally use the drive letter D or perhaps E.
DISKDUP does not need the information provided by the driver
and will work properly as A or B.
DISKDUP will format the target disk if it has not been
previously formatted. In most cases it is not necessary to
use the verify option. However, it only adds a few seconds
to the copy time and really does provide peace of mind.
page 1
DISKDUP Users Guide
DISKDUP and this doc file are Copyrighted (c) 1989 by Roger
K. Snyder. I am releasing DISKDUP as shareware. This means
that you may freely use and copy the program. In fact I
encourage you to give a copy of DISKDUP to everyone you know.
However, if you find DISKDUP to be useful, please send $10.00
to:
Roger K. Snyder
7605 McKenzie Terrace #7
Vero Beach, FL 32968
For those who are curious, DISKDUP is written in 'Microsoft
C' except for the BIOS level floppy disk I/O routines, which
are written in assembler.
Revision history:
1.0 Initial release. Required FORMAT.COM to be in the path.
1.01 Added inline code to format target disks.
1.02 Added /v option to verify disk after write operations.
1.03 Improved error detection. Added control-break handler.
1.04 Streamlined code. Added ability to copy ANOTHER disk
without reloading program.
1.05 Improved user interface. The keyboard buffer is
now flushed before accepting input. No more "Oops, I
hit the enter key one time too many".
And now for the legal mumbo jumbo which should not be needed
but the lawyers say that it is:
DISCLAIMER
This program is provided "as is" with no warranties
whatsoever, either expressed or implied, including without
limitation, warranties of merchantability or fitness for a
particular purpose. The entire risk as to the quality and
performance of the program is with you. Should this program
be defective, you assume the entire cost of all necessary
servicing, repair or correction.
page 2