Can confirm the DOS issue is present. Here are some steps to recreate:
wget http://www.freedos.org/download/download/FD12CD.iso
apt-get install mbr fdisk parted dosfstools qemu-system-x86
# dd if=/dev/zero of=dos.img bs=512 count=1032192
# losetup /dev/loop0 dos.img
# fdisk -u=cylinders /dev/loop0
I have a similar bug: 1674114
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https://bugs.launchpad.net/bugs/1745312
Title:
Regression report: Disk subsystem I/O failures/issues surfacing in
DOS/early Windows [two separate issue
Can you post your commandline for the MSDOS 6.22 issue? NT is known to
have a few problems and may be out of scope for what I can help with,
but I was under the assumption that MSDOS 6.22 was well-behaved in QEMU.
Commandline and steps to reproduce the error may be helpful (any
particularly kind o
QEMU ignores the CHS numbers in VMDK images. From the report, it seems
VirtualBox uses it.
So like what you've discovered, for QEMU the right thing to do for such
a guest would be setting the correct values explicitly from the command
line, rather than let it decide (guess).
I have no idea about
