Re: [Xen-users] Can't use DVD Writer in DomU

["Emre ERENOGLU" <erenoglu@xxxxxxxxx>]

Hi Paul,

Maybe I'm wrong, but from the config file you wrote, I
assume that you're using a PV guest. As far as I remember, you can not
assign a "Device" as a CDROM or CDRW in a PV DomU. although you can
assign a mounted cd drive as a "block disk drive".  This will mean that
you can never use a CD/DVD writer in a PV domU.

In a HVM DomU, you can show a CDROM with your syntax in config file
hdc:cdrom, but I've never seen anywhere that a "writer" device is
emulated. Always read-only cd/dvd rom drive.

What you can do is
to possibly use iSCSI and/or Ata over Ethernet to try to push your cd
writer to a virtual domain. I've never tested it nor I now if is't
technically possible.

I would kindly ask other users to comment and correct me if there's anything wrong.

Regards,

Emre

On Thu, Feb 14, 2008 at 10:48 PM, Paul Waldo <paul@xxxxxxxxxxxxx> wrote:

Hi all,

I'm trying to use an IDE DVD Writer in my domU.  Here is the disk line from my
config file:

disk        =
[ 'phy:hydra/perseus-disk,xvda1,w', 'phy:hydra/perseus-swap,xvda2,w', 'phy:/dev/dvd1,hdc:cdrom,w' ]

I think it is connected, because I get this:
# xm block-list perseus -l
[...]
(5632
   ((backend-id 0)
       (virtual-device 5632)
       (device-type cdrom)
       (state 6)
       (backend /local/domain/0/backend/vbd/12/5632)
       (ring-ref 10)
       (event-channel 8)
       (protocol x86_64-abi)
   )
)

There seems to be no device for the writer, though:
root@perseus:~# ls -l /dev/xvd* /dev/hd*
ls: /dev/hd*: No such file or directory
brw-rw---- 1 root disk 202, 1 Feb 14 16:36 /dev/xvda1
brw-rw---- 1 root disk 202, 2 Feb 14 16:36 /dev/xvda2


I'm running Xen 3.1.0 on a Kubuntu Gutsy Dom0 (AMD64).

Thanks in advance for any tips!

Paul

PS
In my searching for a solution to this, I found some folks saying that I need
to have media in the writer when booting the domU.  Please say it isn't
so!!!! (I did try it, but still no luck)

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

-- 
Emre Erenoglu
erenoglu@xxxxxxxxx
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users