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Re: [Xen-users] Can't use DVD Writer in DomU
- To: "Paul Waldo" <paul@xxxxxxxxxxxxx>
- From: "Emre ERENOGLU" <erenoglu@xxxxxxxxx>
- Date: Fri, 15 Feb 2008 02:14:22 +0100
- Cc: Xen users mailing list <xen-users@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 14 Feb 2008 17:15:03 -0800
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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)
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Emre Erenoglu
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