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1995-12-11
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DISK COPY FAST Copyright 1992-1995 Chang Ping Lee page 1
1. INTRODUCTION:
This document only contains information about new features in
DISK COPY FAST beta v4.94. Please refer to DCF494.DOC for basic
operation of the software.
DISK COPY FAST v5.0 will include many enhancements. Because of
the many changes to the program, it is very difficult to make
sure that it is fully compatible with all hardware and software
combinations. Although it has already undergone extensive
testing, some bugs may still remain. Therefore, this wide beta
release is being made.
All suggestions, and bug or compatibility problem reports are
very welcome and appreciated.
DISK COPY FAST v5.0, DISK COPY PLUS v3.0 and DISK UTIL PACK v3.0
are expected to be released by May 1, 1995. (Note: no guarantee
on the actual release date.)
DISK COPY FAST Copyright 1992-1995 Chang Ping Lee page 2
2. NEW FEATURES
1. PS/2 is now supported. Thanks to Mr. Robert Everett for his
help in making this possible.
2. Many odd-format disks are now supported. This includes
Microsoft DMF, IBM XDF (*) and selected FDFORMAT formats.
Users can also duplicate Macintosh high density disks with
DISK COPY FAST on the PC platform. Target disks can be
formatted on the fly for many of these formats. Please see
the following two sections for specific details and
limitations.
3. The /a option has been greatly enhanced. When ON (default),
DISK COPY FAST checks the track layout of both the source and
target disks before processing. This prevents the mistake of
copying a double density disk to a high density disk, but
still allows flexibility should this operation be desired.
4. The feature of auto formatting target disks has been greatly
enhanced.
* Support for XDF format is limitted to legal backup purpose.
Users must have legal, original copy of such format and can
only produce one backup copy. Advanced feature, such as image
file, hot key for multiple copies, etc., are disabled for XDF
format.
DISK COPY FAST Copyright 1992-1995 Chang Ping Lee page 3
3. DISKETTE FORMATS SUPPORTED
For convenience, the term "non-standard format" refers to all
formats that are not widely used today. This includes 3.5"
diskettes not formatted as 720KB or 1.44MB and 5.25" diskettes
not formatted as 360KB or 1.2MB diskettes.
Diskette formats supported by DISK COPY FAST are divided into
the following four groups. Except for the types in group 4, DISK
COPY FAST can format a target on the fly.
1. Standard formats with valid boot sectors. This includes
360KB, 1200KB in 5.25" drive and 720KB, 1440KB in 3.5" drive.
2. Standard formats with invalid boot sectors. This includes
non-DOS disk such as MAC HD disk and DOS disks that are
infected by virus or have been disinfected from virus but
still have invalid boot sectors. By default, DISK COPY FAST
will give warning, but allow users to choose to "Ignore" it.
This warning can be turned off completely by the /v- option.
3. Selected non-standard formats with valid boot sectors. This
includes Microsoft DMF, IBM XDF and selected formats by
formatting programs such as 800K and FDFORMAT. Specifically,
the following formats are supported and can be formatted on
the fly.
a. Microsoft DMF
b. IBM XDF
c. 3.5" high density disks formatted to 1680KB or 1722KB.
d. 5.25" high density disks formatted to 1440KB or 1476KB.
e. 5.25" double density disks formatted to 800KB.
4. Other non-standard formats with valid boot sectors. DISK COPY
FAST can only copy disks of this group to pre-formatted
targets.
DISK COPY FAST Copyright 1992-1995 Chang Ping Lee page 4
4. MORE ABOUT ODD-FORMAT SUPPORT
Usually, the purpose of "odd-format" formatting is to increase
the capacity of a floppy disk. So far, the largest capacity
boost we have found is the IBM XDF format which is used in OS/2
releases. The XDF format uses larger sector sizes to increase
the capacity of 3.5" high density disk from 1.44MB to 1.836MB.
However, except in very few cases, some kinds of tradeoff do
exist. Usually the access speed is slowed down significantly,
and in some cases the reliability may suffer also. For example,
some formats use more than 80 tracks. As the read/write head
moves toward the center, the length of a track gets shorter.
This means the same amount of data is packed in a smaller area.
Some users may not feel comfortable using such formats for
critical data while others may feel that the difference in
length between the 80th track and the 82th track is not that
significant.
Based on these considerations, we chose to support on-the-fly
formatting for two formats each of the 3.5" and 5.25" high
density disks. For 3.5" high density disks, we support 1680KB
(80 tracks) and 1722KB (82 tracks) formats. For 5.25" high
density disks, we support 1440KB (80 tracks) and 1476KB (82
tracks) formats. Other formats can be copied without on-the-fly
formatting as long as the boot sector is intact.
DISK COPY FAST Copyright 1992-1995 Chang Ping Lee page 5
5. SUGGESTIONS AND BUG REPORTS
All suggestions are welcomed and very much appreciated.
Although this is a wide beta release, it has already undergone
extensive testing. Should you feel there is any compatibility
problem or even a bug, please send your reports to DCF Software.
Please make sure the problem is repeatable, and please describe
it as detailed as possible. Information of the system, DCF
commands used before a problem shows up and the description of
how the problem shows up will be very helpful. For example,
"I run DCF under Windows on a 486/33MHz with EISA bus. I execute
READ command and it reads a 1.2 MB disk in a 1.2MB drive without
problem. Then I use the COMPARE command to compare the same disk
and it turns out OK too. But, when I proceed to use the WRITE
command to write to another 1.2MB disk it stops after a few
tracks. The Information box/window shows it's track 9. A red box
pops up with message "Diskette sector not found" and error code
1234h-5678h. When I press the right mouse button DCF suddenly
quits and gives me yet another error code 123h-456h. I tried it
several times with exactly the same commands sequence and this
problem always happened."
How to contact the author:
1. Call the PIE BBS in Sunnyvale, CA, U.S.A. at (408) 733-4670.
Please leave a message to CHANG LEE in the Shareware Authors
Conference on this BBS.
2. CompuServe Information Service (CIS)
Please send email to 71053,3517.
3. You can also send your suggestions, questions and/or
registration to the following address.
Chang Ping Lee
P.O. Box 60064
Palo Alto, CA 94306
DISK COPY FAST Copyright 1992-1995 Chang Ping Lee page 6
6. ADVERTISEMENT
Imagine that you can read a standard format disk, convert it to
the highest capacity (except XDF format,) then format, write and
compare the target, all done in a single pass! No more slow
formatting by FDFORMAT or similar utilities while you enjoy the
maximum flexibility.
Order DISK COPY PLUS today, receive the latest version, plus a
free update when DISK COPY PLUS v3.0 is ready.
NOTE: 1. The latest version of DISK COPY PLUS is v2.8 which does
NOT include the new features in this DISK COPY FAST
beta v4.94.
2. You need to mention this offer in the order form to
qualify the free update.
3. DISK COPY PLUS v3.0 is expected to be released by
May 1, 1995. (Note: no guarantee on the actual release
date.)