Hello David,
In the meantime, I was able to debug further. Actually in Windows only
the "format disk" operation fails. If you do that otherwise and later
use the formatted disk, it seems to work. So I assume it is a special
SCSI opcode that is only used during "format disk" that fails.
You could print the SCSI opcode value with something like:
Thanks for the help. I was able to find the root cause. To avoid
duplication with the issue tracker of the kvm-guest drivers, here is the
link to my findings:
https://github.com/virtio-win/kvm-guest-drivers-windows/issues/446
Please feel free to add more comments to remaining open questions there.
Especially about the question of alignment in BIOs.
Regards Andreas