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CluelessInSeattl(R)

Seattle, USA,
16.08.2012, 03:45
 

How to back-up MS-DOS 6.21 Installation Diskettes? (Users)

I just dug out my set of three installation diskettes for MS-DOS 6.21.

I thought I had back-ups of them, but I can't find them.

Since my latest project is trying to get my old MS-DOS system up and running again, I figure that the first thing I need to do is make a couple of back-up sets of these precious disks.

Can I just use the MS-DOS diskcopy command?

Do I need to use the SYS command too?

I'd like to copy these diskettes to CDs too. Is there a way to copy images of the diskettes to the a CD, so that I could then at some future date use the CD to make exact replicas of my original diskettes?

---
Will in Seattle
a.k.a. "Clueless"
Running MS-DOS 6.21

Laaca(R)

Homepage

Czech republic,
16.08.2012, 07:26

@ CluelessInSeattl
 

How to back-up MS-DOS 6.21 Installation Diskettes?

> Can I just use the MS-DOS diskcopy command?
>
> Do I need to use the SYS command too?


You need to use SYS command too.

But maybe better way is to use utiities REREAD and RAWRITE. (search the web for them)
The first one makes a ISO image of the diskette (you can store it in CD if you want) and RAWRITE writes the ISO into new diskette.
There are two caveats:
1) the diskette musn't have sector errors
2) the source and destination diskette must be the same size.
(it is not possible to make ISO from 5'1/4 diskette and write it into 3'1/2)

---
DOS-u-akbar!

Rugxulo(R)

Homepage

Usono,
16.08.2012, 08:33

@ Laaca
 

How to back-up MS-DOS 6.21 Installation Diskettes?

> > Can I just use the MS-DOS diskcopy command?

No, I don't think MS' version works that way, but DR-DOS does (incompatibly, though). Even better is to use, as mentioned, RAREAD or even FD DiskCopy, both of which work fine:

http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/dos/diskcopy/0.9/dskcp095.zip

http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/disk/raread/raread11.zip

bretjohn(R)

Homepage E-mail

Rio Rancho, NM,
16.08.2012, 17:18

@ Laaca
 

How to back-up MS-DOS 6.21 Installation Diskettes?

> > Can I just use the MS-DOS diskcopy command?
> >
> > Do I need to use the SYS command too?
>
>
> You need to use SYS command too.


It's been so long that I'm not 100% sure, but (at least MS) DISKCOPY does a sector-by-sector copy, so you don't need to use SYS. As you stated, though, DISKCOPY requires disks of the exact same type and size.

If you're copying between disks of different sizes, you should be able to use COPY/XCOPY, and then SYS to make the first disk of the series bootable (or SYS first and then COPY/XCOPY). Only the first disk of the series should need to be bootable.

Also, some programs use the volume label on the disk to determine which disk is being accessed. I don't know if the MS-DOS setup program works that way or not. If it does, you might also need to LABEL the copied disks if you use COPY/XCOPY & SYS (if you DISKCOPY, the volume label is copied automatically).

Another possibility is that the installation program allows all of the installation files to be one one disk, even if they weren't originally that way. E.g., if there were originally three 360k installation disks, you can simply do a SYS and COPY/XCOPY the contents of all three disks onto one 1.44M disk and the install program will still work OK. Again, I don't know if the MS-DOS setup program works that way or not.

No simple generic answer, unfortunately.

mvojvodic(R)

16.08.2012, 20:24
(edited by mvojvodic, 16.08.2012, 22:07)

@ bretjohn
 

How to back-up MS-DOS 6.21 Installation Diskettes?

> No simple generic answer, unfortunately.

There is simple generic answer.

Get HD-COPY 2.5E, it is freeware. It has simple TUI interface and
it works in real DOS and all Windows versions (I did not test it
under Windows 8).
It makes standard raw diskette image files (hex EB at offset 0)
compatible with many floppy utilities.
I use it for more than ten years.

Raw diskette image info from my MultiArc plugin INI
for Total Commander (using UNDDI 1.04 MultiArc release):

ID=EB
IDPos=0
Extension=bif,flp,ima,img,vcp,vfd
; All raw diskette images have ID=EB at IDPos 0, except
; HD-COPY 2.x compressed IMG images which have it at IDPos=187
; (187 dec=BB hex)
; HD-COPY 2.x by Oliver Fromme makes compressed IMG images
; by default. To make uncompressed IMG images one has to use
; command line switch /I- or use this switch in HD-COPY.CFG
; to make that option permanent (the letter I must be uppercase).
;
; RAWRITE and other DOS and Linux raw floppy image utilities
; always produce uncompressed IMG images.
;
; The following images are identical by contents:
; RAWRITE and HD-COPY uncompressed IMG
; WinImage, UltraISO, and PowerISO uncompressed IMA
; Virtual PC VFD
; VMWare FLP
; MagicISO BIF

Notes: RAWRITE does not make ISO images, diskettes are not CDs.
You can write floppy image to a diskette of different size if
image contents can fit. I even copied 1.44 MB image (first 62 tracks,
the rest was empty) to 1.2 MB 5" diskette. The diskette written
had 1.44 MB geometry, but that is not a problem for any new
BIOS version after 1996, older BIOSes cannot handle such
diskettes (for older BIOS you need FDREAD TSR also).

Do not use VGA-COPY 6.25. It is freeware, has nice GUI interface,
works in DOS (and Windows except Vista and 7), and it can work
with very unusual exotic formats, but it cannot copy boot records
without special boot record file VGACOPY.BIN (which you have to make
by yourself). Its VCP image is not RAWRITE compatible.

You can download HD-COPY 2.5E at
https://rapidshare.com/files/4090226846/HDCP25E.RAR

I edited HD-COPY.CFG so it will always make uncompressed images
compatible with RAWRITE.

Of course, diskette images can be stored on CD like any other file
and HD-COPY can use them directly from CD. I am a little bit
paranoid, so I use DVD-RAM or M-Disk for important data.

Maybe this will help you.

P.S.
Rugxulo, do not delete or edit this message (as you did with other
one) because HD-COPY is really freeware (but it can be found on
VetusWare).

Arjay(R)

01.09.2012, 23:51

@ mvojvodic
 

How to back-up MS-DOS 6.21 Installation Diskettes?

> Do not use VGA-COPY 6.25. It is freeware, has nice GUI interface,
> works in DOS (and Windows except Vista and 7), and it can work
> with very unusual exotic formats, but it cannot copy boot records
> without special boot record file VGACOPY.BIN (which you have to make
> by yourself).
The version on Thomas Moenkemeier's homepage comes with VGACOPY.BIN - if you run the self extracting (LHA) archive ENGLISH.EXE within the directory to which you unzipped vgacp625.zip then the SFX archive will unzip the English version of VGACOPY.BIN, VGACOPY.HLP and FILE_ID.DIZ replacing the German versions.

moenk.de - downloads - VGA-Software - vgacp625.zip
VGACOPY homepage (original in German) - Google translate: English

rr(R)

Homepage E-mail

Berlin, Germany,
16.08.2012, 22:28

@ CluelessInSeattl
 

How to back-up MS-DOS 6.21 Installation Diskettes?

> I'd like to copy these diskettes to CDs too. Is there a way to copy images
> of the diskettes to the a CD, so that I could then at some future date use
> the CD to make exact replicas of my original diskettes?

I often used Image from http://www.stefanbion.de/dosprogs/.
This site also has some other nice stuff for DOS, e.g., Make86, MemPatch, R86, ...

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