In article <[log in to unmask]>, Bill Lancaster
<[log in to unmask]> writes
>Hi all,
>
>Does anyone know of a way to restore on a Windows 95 system files stored on
>a DOS system using BACKUP.EXE??  I'm not sure what version of DOS it was
>but the Windows 95 version of BACKUP doesn't recognize the backed-up data
>as restorable.
>
>TIA,
>
>Bill Lancaster

Hey, let's pretend these files are relevant to your HP3000 setup :-)

In general, any DOS RESTORE will bring back data made with the
corresponding release of BACKUP, or with an earlier BACKUP release.

Sometimes, an 'earlier' RESTORE can read a 'later' BACKUP, but only if
the software didn't really change in between, and the version number
change was just cosmetic.

The big exception to the later RESTORE/earlier BACKUP, IIRC, is BACKUPs
made with DOS 6.00 and 6.20, which can't be read by later
(6.21/6.22/7.00 RESTOREs).

Reason is that 6.00 and 6.20 used DoubleSpace compression technology,
which MS was forced by a lawsuit to discontinue. This technology was
used in the BACKUP process to save space, even if your drives weren't
themselves DS'ed.

So 6.21 was a hurried 'DOS 6.20 minus DoubleSpace', while 6.22 was 'DOS
6.21 plus DriveSpace'. 6.22 could read 6.22, 6.21, 5.00 and earlier
BACKUP formats.

But since it was not allowed to use DoubleSpace technology, it could not
read/restore 6.00/6.20 BACKUPs, and nor can the 7.00 RESTORE in WIN95.

Probably, you've got a BACKUP from 6.00 or 6.20. Best bet is to find a
PC still running one of these, RESTORE your files on that, ZIP them off,
and feed them to WIN95 that way.

Maybe you even could set up an old 386 junker on 6.20, (but don't
DoubleSpace it!), do the RESTORE there, upgrade it to 6.22, and then
make a BACKUP that WIN95 *could* read.

HTH

--
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