Re: [Xen-users] CDROM on PV domU

[Wolfgang Grossbauer <wg@xxxxxxxxxxxxxx>]

Felix Kuperjans wrote:
>   Hi,
>
> you made a small error in your disk configuration:
>
> disk = [ 'phy:/dev/scd0,*hdc:*cdrom,w' ]
>
> You have to specify hdc (or anything similar) to set the position of the 
> cdrom drive (in this case: secondary IDE, master).
> It is also possible to specify e.g. sda:cdrom, which will attach the 
> device to the first SCSI port (but you can't boot from SCSI devices).
> In addition, I think it was rather /dev/scd0 instead of /dev/sd0.
>
> I hope this helps you.
>
> Felix
>
> Am 28.04.2010 18:14, schrieb Wolf Grossi:
> > Hi,
> >
> > how do I attach a cdrom to a pv guest?
> > Xen-server is openSuSE-11.2 and domU is opensuse-11.2.
> >
> > According to the xen-manual I tried
> > disk = [ 'phy:/dev/sd0,cdrom,w' ]
> > in the vm configuration.
> > When creating the vm however it crashes w/o a message in 
> > /var/log/qemu-dm-opensuse11.log
> > I've also tried to attach with
> > xm block-attach opensuse11 phy:/dev/sr0 /dev/cdrom r
> > same problem as obove.
Thanks Felix, I proceeded as you suggested, however still the same problem.
vm config sections:
disk=[ 'file:/var/lib/xen/images/MAGRO1V/disk0,xvda,w'
      ,'phy:/dev/sr0,hdc:cdrom,r'
     ]

running 'xm create ...' I get
...
2.267952] kernel BUG at 
/usr/src/packages/BUILD/kernel-xen-2.6.31.5/linux-2.6.31/block/blk-core.c:2216!
[    2.267952] invalid opcode: 0000 [#1] SMP
[    2.267952] last sysfs file:
[    2.267952] Modules linked in: xenblk(+) cdrom
...
etc.etc

Reading 'kernel BUG' lets my alarm bells ring - do I need an updated 
xen-kernel?
Wolf




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