Sorry for disturbing once again.
The vhd formatted by Windows 10 (FAT) Nr. 2 does not give out an error message when booting without fdconfig / fdautoexec.bat.
Willi
Beer will follow now!
Sent: Sunday, July 11, 2021 at 12:02 AM
From: "Wilhelm Spiegl" <wilhelm.spi...@mail.com>
To: freedos-devel@lists.sourceforge.net
Subject: Re: [Freedos-devel] FDISK issue
From: "Wilhelm Spiegl" <wilhelm.spi...@mail.com>
To: freedos-devel@lists.sourceforge.net
Subject: Re: [Freedos-devel] FDISK issue
Now it becomes absolutely confusing:
format d: /u says:
Full formatting (wiping all data)
Zapping / checking 443889 sectors and after a standard message
[Error 36]
I repeated with format d: /u /d:
FAT1x size: 217, using FAT16
Disk size 217MBytes, FAT16
[debug] enabled accessing flags
...
Full formatting (wiping all data)
Zapping / checking 443889 sectors and after a standard message
+***bad sectors: 1 (code 0x201) on WRITE
+***bad sectors: 1 (code 0x201) on READ
One of the first 5 sectors is broken. Format not possible
Repeated once again:
format d: /q /d
...
Warning: Resets cluster marks, if any
File system creation
Boot sector -> 0
Drive_IO (Write 0 Count 1) [FAT12/16] (drive d)
critical error during DOS disk access
DOS driver error (hex):01
Description: Unknown unit for driver
Program terminated
Same problem with 484 MB partition (other virtual machine).
Format d:
/q /u exits with error 129,
/u exits with error 36,
/y exits with error 129,
/q /d with the unknown unit for driver
/u /d with the bad sectors
When removing the vhd from virtualbox and adding the vhd as hd at Win10 it asks for formatting.
Windows HD manager says: 484 MB RAW, no failures, active, primary partition, so these settings seem to be correct.
After formatting by Windows 10 the vhd works fine in FD as drive d. I added files an ran chkdsk, no problem.
Win-result: 507.535.360 Bytes,
8.192 Bytes per cluster,
61955 total clusters
If I have a little time I will try if the problem also occurs with the first HD when creating a partition from diskette.
Willi
Cheers! But with more alcohol (5 percent - no ... water...now!)
Sent: Saturday, July 10, 2021 at 10:38 PM
From: "Eric Auer" <e.a...@jpberlin.de>
To: freedos-devel@lists.sourceforge.net
Subject: Re: [Freedos-devel] FDISK issue
From: "Eric Auer" <e.a...@jpberlin.de>
To: freedos-devel@lists.sourceforge.net
Subject: Re: [Freedos-devel] FDISK issue
Hi!
> Boot sector unreadable, disk not yet formatted.
You can skip that check by explicitly requesting a
not undoable formatting, see FORMAT /? and use /U
or better /Q /U for quick unconditional format.
> Cannot find existing format - Not saving UNFORMAT data. Please enter
> volume label (none) etc. No label, disk will have no creation timestamp.
> Quick formatting (only flushing metadata)
> Warning, resets bad cluster markings, if any
> DRIVE_IO (WRITE 0, count 1) [FAT12(16] [drive D*]
> Critical error during DOS disk access
> DOS driver error (hex):01
> Description: unknown unit for driver
> Program terminated.
> [Error 129]
So it tries to use FAT16 access for FAT32 drives?
As you say /D made no difference, did /D display
useful extra details? D for debug mode, that is.
If I understand you correctly, you tried to make
tha partition FAT32 in FDISK? Have you checked if
it worked by looking at the FDISK status after a
reboot?
> format version is 0.91w
> Same results with format d: /d
This version is the first which uses OpenWatcom C,
can you check whether FORMAT 0.91v works better?
> If I do the same with a bigger virtual HD (ca. 550 MB size) fdisk
> creates a FAT32 partition and format has NO problems.
> I tried both two times.
>
> Any ideas? Is it reproducable?
As said, please compare FORMAT 0.91v here. You should
also ask WHICHFAT D: to see which partition type the
DOS kernel wants for D: or you could even check whether
using a non-FreeDOS kernel makes a difference for you.
Whichfat: https://auersoft.eu/soft/specials/
Format 0.91v: https://auersoft.eu/soft/by-others/
Regards, Eric
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