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Date: Mon, 03 Sep 2012 06:23:53 +0800
From: ching <lsching17@gmail.com>
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Subject: Re: [Qemu-devel] boot device order has no effect for virtio-scsi
	devices
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To: qemu-devel@nongnu.org

On 08/30/2012 07:31 PM, ching wrote:
> My host is Gentoo x64, kernel 3.5.2, qemu-kvm 1.1.1-r1, libvirt 0.9.13, seabios 1.7.0
>
> i try to set the boot order with scsi cd-rom first, then scsi harddisk
>
> but the virtual machine will always boot with first scsi device only (unit='0', the scsi harddisk)
>
> is it a known problem?
>
> my libvirt config:
>
> <domain type='kvm'>
>   <name>Linux</name>
>   <uuid>xxx</uuid>
>   <memory unit='KiB'>1048576</memory>
>   <currentMemory unit='KiB'>1048576</currentMemory>
>   <vcpu placement='static'>2</vcpu>
>   <os>
>     <type arch='x86_64' machine='pc-1.1'>hvm</type>
>     <boot dev='cdrom'/>
>     <boot dev='hd'/>
>     <bootmenu enable='no'/>
>   </os>
>   <features>
>     <acpi/>
>     <apic/>
>     <hap/>
>   </features>
>   <cpu mode='host-model'>
>     <model fallback='allow'/>
>   </cpu>
>   <clock offset='utc'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>restart</on_crash>
>   <devices>
>     <emulator>/usr/bin/qemu-kvm</emulator>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='raw' cache='unsafe' io='native'/>
>       <source file='/Linux.raw_image'/>
>       <target dev='sda' bus='scsi'/>
>       <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/>
>       <address type='drive' controller='0' bus='0' target='0' unit='1'/>
>     </disk>
>     <controller type='usb' index='0'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
>     </controller>
>     <controller type='virtio-serial' index='0'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
>     </controller>
>     <controller type='scsi' index='0' model='virtio-scsi'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
>     </controller>
>     <interface type='direct'>
>       <mac address='xx'/>
>       <source dev='eth0' mode='bridge'/>
>       <model type='virtio'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
>     </interface>
>     <serial type='pty'>
>       <target port='0'/>
>     </serial>
>     <console type='pty'>
>       <target type='serial' port='0'/>
>     </console>
>     <channel type='spicevmc'>
>       <target type='virtio' name='com.redhat.spice.0'/>
>       <address type='virtio-serial' controller='0' bus='0' port='1'/>
>     </channel>
>     <input type='mouse' bus='ps2'/>
>     <graphics type='spice' autoport='yes'>
>       <image compression='off'/>
>       <jpeg compression='never'/>
>       <zlib compression='never'/>
>       <playback compression='off'/>
>       <streaming mode='off'/>
>     </graphics>
>     <sound model='ich6'>
>       <codec type='micro'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
>     </sound>
>     <video>
>       <model type='qxl' vram='65536' heads='1'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
>     </video>
>     <redirdev bus='usb' type='spicevmc'>
>     </redirdev>
>     <memballoon model='virtio'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
>     </memballoon>
>   </devices>
> </domain>
>
have anyone tested the boot order of virtio-scsi devices?

<os>
    <type arch='x86_64' machine='pc-1.1'>hvm</type>
    <boot dev='cdrom'/>
    <boot dev='hd'/>
    <bootmenu enable='no'/>
  </os>


i try to set the boot order with scsi cd-rom first, then scsi harddisk

but the virtual machine will always boot with first scsi device only (unit='0', the scsi harddisk)

is it a known problem?