At Tue, 9 Jun 2020 00:00:17 +0200, Manuel Bouyer <[email protected]> wrote: Subject: Re: regression: xen domU no longer supports "type=cdrom" vbd disk > > On Mon, Jun 08, 2020 at 02:26:39PM -0700, Greg A. Woods wrote: > > I use xl.cfg "disk" entries like the following to mount a virtual CDROM > > in a Xen domU: > > > > 'format=raw, vdev=0x5, access=ro, devtype=cdrom, > > target=/images/NetBSD-9.0-amd64.iso' > > > > However since upgrading my -current source tree I've been seeing: > > > > xenbus0: ignoring device/vbd/4 type cdrom > > > > As shown in this patch I had to comment out the core of the mentioned > > change to be able to use an ISO image again as a virtual CDROM again: > > Actually this change matches what other OSes do with 'devtype=cdrom', > we were an outsider here. > > For PV or PVH domUs you can omit the devtype keyword, it's only > needed for HVM guests (if you want to boot from the cdrom image).
Ah OK, I think I understand, thanks!
Perhaps this could be mentioned quite explicitly in in the CHANGES file
(though that's not the first place I though to look, unfortunately)
Maybe the xen/howto on the wiki could be more explicit about mapping a
"image.iso" file to a disk vdev (perhaps instead of the currently less
helpful suggestions about mapping an existing actual /dev/cd0a device).
(Of course the xen/howto could use a lot of help.)
(Not to mention but also some upstream Xen docs seem to need updating
too, e.g. the xl-disk-configuration(5) manual page (that we
unfortunately do not seem to install in the xentools package). Lots of
guides mention using "devtype=cdrom" any time an "image.iso" is used.)
--
Greg A. Woods <[email protected]>
Kelowna, BC +1 250 762-7675 RoboHack <[email protected]>
Planix, Inc. <[email protected]> Avoncote Farms <[email protected]>
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