On 02/05/2020 01.23, Olaf Klinke wrote:
> (Apologies for pestering this list with another newbie question.)
>
> So I have this external DVD-RW drive (Asus SDRW-08U7M-U to be
> specific). On my Debian stretch laptop, plugging in the USB drive
> creates /dev/sr0 as well as several symlinks to it, e.g. /dev/cdrw,
> /dev/dvd etc.
>
> Plugging the drive into my Qubes desktop, I get notified of the
> availability of this drive and can attach /dev/sr0 to a Debian buster
> AppVM qube as /dev/xvdi. I can mount /dev/xvdi and read data from a CD
> allright.
>
> However, in contrast to my Debian laptop, brasero does not recognize
> the drive as a writer, not even when I create the same /dev/cdrw
> symlink. In addition to that, both commands
> dvd+rw-mediainfo /dev/xvdi
> cd-info -C /dev/xvdi
> exit with an error (details below). Thus it seems that some crucial bit
> did not get forwarded to/is not installed in the AppVM. Probably I'm
> just lacking the knowledge how different writing to a CD is from
> reading from CD, on the hardware level. Is there more to burning a CD
> than a single block special device?
>
> Any hints welcome.
> Olaf
You must attach your drive via USB to the target VM, rather than as a
block device. When attached as a block device, the Xen block device
driver does /not/ make your drive visible /as a DVD/RW drive/.
--
Rudd-O
http://rudd-o.com/
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