Re: Unable to boot from SCSI disk

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

28.05.2013 00:59, Paolo Bonzini wrote:

Thank you Paolo for forwarding this email to me.

> Il 27/05/2013 22:53, Daniel Guillermo Bareiro ha scritto:
>> Hi all!
>>
>> I'm trying libvirt and virt-manager and I found that if I install a
>> virtual machine with SCSI disks, the installation is done without
>> problems but when it boots, it is unable to boot from these disks. If I
>> use bus=sata or bus=virtio, this problem does not happen.
> 
> The default SCSI controller is buggy.  Try using a newer model if
> available on your qemu-kvm version, for example virtio-scsi (CCing the
> Debian maintainer).

Well, it isn't really that lsi emulation is _that_ buggy.  It is
enough for some stuff.  But..

> What is the version of SeaBIOS?

but  it is wheezy, which ships with seabios 1.7.0, which does not
have scsi boot support.  So in order to boot from scsi, you have
to use old ,boot=on device property, which has been forward-ported
from older qemu-kvm version to 1.1 version used on debian, because
it was the only way at that time to boot from an scsi disk without
resorting to using proprietary firmware.

So, boot=on as the drive property should do the trick.  But I'm not
sure it is supported under libvirt.

BTW, why are you installing stuff on scsi?  Is there some particular
reason for that?

Thanks,

/mjt