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

From: Thomas Huth
Subject: [Bug 1674114] Re: Bad sectors when using MS-DOS 6.22
Date: Tue, 10 Nov 2020 14:57:55 -0000

The QEMU project is currently considering to move its bug tracking to another 
system. For this we need to know which bugs are still valid and which could be 
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state 
back to "New" within the next 60 days, otherwise this report will be marked as 
"Expired". Or mark it as "Fix Released" if the problem has been solved with a 
newer version of QEMU already. Thank you and sorry for the inconvenience.

** Changed in: qemu
       Status: New => Incomplete

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  Bad sectors when using MS-DOS 6.22

Status in QEMU:

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 
  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 
  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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