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Date: Tue, 04 Sep 2012 08:23:45 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] boot device order has no effect for virtio-scsi
	devices
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To: ching <lsching17@gmail.com>
Cc: qemu-devel@nongnu.org

Il 04/09/2012 02:03, ching ha scritto:
> i add boot order and the virtual machine still boot from hard disk instead of cd-rom
> 
> <disk type='file' device='disk'>
>       <driver name='qemu' type='raw' cache='unsafe' io='native'/>
>       <source file='/Linux.raw_image'/>
>       <target dev='sda' bus='scsi'/>
>       <boot order='2'/>
>       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>     </disk>
>     <disk type='file' device='cdrom'>
>       <driver name='qemu' type='raw' cache='unsafe' io='native'/>
>       <source file='/xubuntu-12.04-desktop-amd64.iso'/>
>       <target dev='sdb' bus='scsi'/>
>       <readonly/>
>       <boot order='1'/>
>       <address type='drive' controller='0' bus='0' target='0' unit='1'/>
>     </disk>
> 
> here is the captured command line generated by libvirt (uuid and mac address are masked)

Ah, ok.  libvirt for now supports only booting from LUN 0.  You can use
multiple targets instead of multiple units.

Paolo