Re: [Qemu-devel] Problems changing dvdrom iso during execution

[David S. Ahern]

On 05/20/2010 02:29 PM, Adnan Khaleel wrote:
> I cannot change DVD roms during execution using the monitor. I can only
> mount a cdrom/dvdrom if I specify the iso file in the command line
> x86_64-softmmu/qemu-system-x86_64 -hda ../../OSImages/sles11.qcow2
> -cdrom ../../ISOz/mydvd.iso -m 2048
> 
> In the guest I can mount the iso image as you could normally expect
> mount /dev/cdrom /mnt
> mount: block device /dev/sr0 is write-protected, mounting read-only
> 
> Info block in the monitor yields
> (qemu) info block
> ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0
> drv=dcow2 encrypted=0
> ide1-cd0: type=cdrom removable=1 locked=1 file=../../ISOz/mydvd.iso ro=0
> drv=raw encrypted=0
> floppy0: type=floppy removable=1 locked=0 [not inserted]
> sd0: type=floppy removable=1 locked=0 [not inserted]
> 
> When I try to do a eject ide0-cd0, I get a device busy message so I have
> to do a eject -f ide0-cd0
> 
> After which, an info block yields:
> (qemu) info block
> ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0
> drv=dcow2 encrypted=0
> ide1-cd0: type=cdrom removable=1 locked=1 [not inserted]
> floppy0: type=floppy removable=1 locked=0 [not inserted]
> sd0: type=floppy removable=1 locked=0 [not inserted]
> 
> I change the iso image with (or so it seems)
> 
> (qemu) change ide1-cd0 ../../ISOz/mydvd2_rom.iso
> (qemu) info block
> ide0-hd0: type=hd removable=0 file../../OSImages/sles11.qcow2 ro=0
> drv=dcow2 encrypted=0
> ide1-cd0: type=cdrom removable=1 locked=1 file=../../ISOz/mydvd2.iso
> ro=0 drv=raw encrypted=0
> floppy0: type=floppy removable=1 locked=0 [not inserted]
> sd0: type=floppy removable=1 locked=0 [not inserted]
> 
> I go back to the guest and when I try to mount:
> 
> mount /dev/cdrom /mnt
> mount: /dev/sr0 unknown device
> 
> I'm running sles11 as guest and I think it may have something to do with
> sles11 as it works fine with ubuntu9.
> 
> Any ideas what might be happening?

Does it work if the guest uses ide based CD's:
rmmod ide-scsi
modprobe ide-cd

David


> 
> Thanks
> 
> AK