Xen devel - Dec 2007 - Error while booting Windows from image file

Hi people,

i''m using the latest version of Xen 3.2 with a debian -4.0r1. there are
no problems by compiling and installing of xen. installing a windows vm from
physical cd-rom is also no problem. but when a want to install windows from a
image file(winxp.iso), i get the following message :


ata0master: QEMU HARDDISK .......
ata0slave: unknown device
ata1master: QEMU CD-ROM ATAPI-4 CD-Rom/DVD-Rom
ata1slave: unknown device

Booting from CD-Rom ....
CDROM boot failure code : 0004
Boot from CD-Rom failed: could not read the boot disk
FATAL: No bootable devices 


My config file is :
kernel = "/usr/lib/xen/boot/hvmloader"
builder=''hvm''
memory = 2048
name = "WinXP"
vcpus=2
disk = [ ''file:/var/lib/xen/images/winxpdisk.img,
ioemu:hda,w'',
''file:/winimages/winxp.iso,ioemu:hdc:cdrom,r'' ]
device_model = ''/usr/'' + arch_libdir +
''/xen/bin/qemu-dm
boot="d"
vnc=1


what do you think, where can be the error? i tried many combinations and looked
the examples in the user manual, but booting from image file doesn''t
work.
And one more thing. When i installed a virtual machine, how can i change the
boot device for the next boot operations of it, so that the installed machine
every time boots from the virtual disk, and not from the cd-rom?

Kindly Regards

Stefan



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Hi there,
> i''m using the latest version of Xen 3.2 with a debian -4.0r1.
there are no
> problems by compiling and installing of xen. installing a windows vm from
> physical cd-rom is also no problem. but when a want to install windows from
> a image file(winxp.iso), i get the following message :
>
>
> ata0master: QEMU HARDDISK .......
> ata0slave: unknown device
> ata1master: QEMU CD-ROM ATAPI-4 CD-Rom/DVD-Rom
> ata1slave: unknown device
>
> Booting from CD-Rom ....
> CDROM boot failure code : 0004
> Boot from CD-Rom failed: could not read the boot disk
> FATAL: No bootable devices
Weird, I''m not sure I''ve seen this one before.
> My config file is :
> kernel = "/usr/lib/xen/boot/hvmloader"
> builder=''hvm''
> memory = 2048
> name = "WinXP"
> vcpus=2
> disk = [ ''file:/var/lib/xen/images/winxpdisk.img,
ioemu:hda,w'',
> ''file:/winimages/winxp.iso,ioemu:hdc:cdrom,r'' ]
device_model = ''/usr/'' +
> arch_libdir + ''/xen/bin/qemu-dm
Are you sure this file exists?  Are you sure it''s a valid ISO?  Can you
mount
it in dom0 using something like:

mkdir /mnt/temp
mount -o loop /winimages/winxp.iso /mnt/temp

Does that work?

You can get rid of the "ioemu:" statements for disks in your config
file; they
are not necessary.
> boot="d"
> vnc=1
>
>
> what do you think, where can be the error? i tried many combinations and
> looked the examples in the user manual, but booting from image file
doesn''t
> work. And one more thing. When i installed a virtual machine, how can i
> change the boot device for the next boot operations of it, so that the
> installed machine every time boots from the virtual disk, and not from the
> cd-rom?
To boot from the hard drive by default, set boot="c" in your config
file.

Cheers,
Mark

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Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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On 7/1/08 01:50, "Mark Williamson"
<mark.williamson@cl.cam.ac.uk> wrote:
>> Booting from CD-Rom ....
>> CDROM boot failure code : 0004
>> Boot from CD-Rom failed: could not read the boot disk
>> FATAL: No bootable devices
> 
> Weird, I''m not sure I''ve seen this one before.
The BIOS thinks the CDROM image is not valid El Torito. Probably either not
bootable CDROM image, or not a CDROM image at all!

 -- Keir



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