Re: [Xen-users] Problem with export of physical devices to domU

[Sadique Puthen <sputhenp@xxxxxxxxxx>]

Jan Marquardt wrote:
> Hi,
>
> I am trying to get a domU working with pyhsical devices exported from 
> dom0, but the boot of domU always fails with the following message in 
> VNC:
> [..]
> Booting from Hard Disk...
> Boot from Hard Disk failed: could not read the boot disk
> FATAL: No bootable device
>
> Xen 3.1.0 was installed from source and is running under Debian Etch. 
> Kernel Version 2.6.18. On the device, which I want to export is also a 
> Debian Etch installed.
> The config of the domU looks like the following:
>
> import os, re
> arch = os.uname()[4]
> if re.search('64', arch):
>     arch_libdir = 'lib64'
> else:
>     arch_libdir = 'lib'
> kernel = "/usr/lib/xen/boot/hvmloader"
> builder='hvm'
> memory = 1024
> name = "ExampleHVMDomain"
> vif = [ 'type=ioemu, bridge=xenbr0' ]
> disk = [ 'phy:/dev/sdb1,ioemu:sda1,w' ]
I suspect scsi emulation is actually supported. You should have to use 
IDE emulation.
disk = [ 'phy:/dev/sdb1,ioemu:hda1,w' ]

--Sadique
> device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
> boot="c"
> sdl=0
> vnc=1
> vncpasswd=''
> stdvga=0
> serial='pty'
>
> I already tried a lot of different values for disk, but each try ends 
> with the same message. Example tries:
> disk = [ 'phy:/dev/sdb1,sda1,w' ]
> disk = [ 'phy:/dev/sdb,ioemu:sda,w' ]
> disk = [ 'phy:/dev/sdb,ioemu:sda,w', 'phy:/dev/sdb1,ioemu:sda1,w'  ]
> disk = [ 'phy:sdb1,ioemu:sda1,w' ]
>
> I think I just made a beginner's mistake and I hope someone is able to 
> point me in the right direction. If you need any further information, 
> please let me know.
> Thanks in advance.
>
> Jan Marquardt

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