[Bug 1674114] Re: Bad sectors when using MS-DOS 6.22

[Mario]

The issue is resolved in the current release

C:\tmp>"C:\Program Files\qemu\\qemu-system-i386.exe" --version
QEMU emulator version 5.1.92 (v5.2.0-rc2-11843-gf571c4ffb5-dirty)
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers

** Changed in: qemu
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/1674114

Title:
  Bad sectors when using MS-DOS 6.22

Status in QEMU:
  Fix Released

Bug description:
  When I try to install DOS 6.22 in QEMU, I get many disk errors when
  the virtual disk is beeing partionized and formatted. When I later do
  a SCANDISK, I can see many bad sectors and file errors.

  I have tested this with the following disk formats: qcow2, vmdk, raw.

  I tested this on Windows 7 with the following command line and QEMU version:
  qemu-system-i386 -name "Windows 3.11 WfW" -machine isapc -cpu 486 -boot 
order=adc -m 32 -soundhw sb16 -hda disk1.qcow2 -vga cirrus

  qemu-system-i386 --version
  QEMU emulator version 2.8.50 (v2.8.0-12557-g0bd1f6b1b2-dirty)
  Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers

  I then did a test with the linux version of qemu, which gave me the same 
results.
  Command line: qemu-system-i386 -name "Windows 3.11 WfW" -machine isapc -cpu 
486 -boot order=adc -m 32 -soundhw sb16 -hda disk1.qcow2 -vga cirrus -monitor 
stdout
  Version: qemu-system-i386 --version
  QEMU emulator version 2.1.2 (Debian 1:2.1+dfsg-12+deb8u6), Copyright (c) 
2003-2008 Fabrice Bellard

  I also checked the disk image with qemu-img, with no results:

  No errors were found on the image.
  7986/8000 = 99.83% allocated, 0.20% fragmented, 0.00% compressed clusters
  Image end offset: 523698176

  Because I got the error with two different versions of QEMU, I think
  this is a general problem and not related to a specific distribution.

  I have attached a zip file with screenshots of SCANDISK, which shows
  the disk errors.

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