Re: [Qemu-devel] Bug#768517: qemu-system-x86: virtio-scsi unreliable - crashes and write failures

[Michael Tokarev <mjt@tls.msk.ru>]

[I forgot to add one comment]

08.11.2014 07:32, Michael Tokarev wrote:
> Control: tag -1 + moreinfo confirmed
> 
> [Adding qemu-devel@]
> 
> 08.11.2014 04:28, Ray Kohler wrote:
>>
>> virtio-scsi is quite unreliable compared to the version in wheezy. I see
>> many crashes, with this output:
>>
>> qemu-system-x86_64: wrong size for virtio-scsi headers

So you're saying this is a regression compared with version 1.1.2.
But the thing is -- did virtio-scsi _ever_ worked in 1.1?  I don't
think it was.  At least I can't perform the same OpenBSD install
in 1.1 verison at all -- the installer can't write anything to
virtio-scsi, it fails for me right when writing a partition table,
with "Invalid argument/Illegal Request" SCSI error code.

So it looks like this is not a regression, quite the opposite...

Unless, ofcourse, I'm doing something incorrectly.


qemu-system-x86_64 -enable-kvm -m 1G \
 -device virtio-scsi-pci,id=scsi \
 -drive file=foo.img,if=none,cache=unsafe,id=d \
 -device scsi-hd,drive=d \
 -vga std -cpu host -cdrom cd56.iso -monitor stdio

(for both 2.1 and 1.1.)

Thanks,

/mjt