Re: [Qemu-devel] block bug: tray status is not updated (and/or guest ignores it)

[Daniel P. Berrange]

On Fri, May 27, 2011 at 04:35:24PM +0200, Markus Armbruster wrote:
> "Daniel P. Berrange" <address@hidden> writes:
> 
> > On Fri, May 27, 2011 at 10:39:35AM -0300, Luiz Capitulino wrote:
> >> On Fri, 27 May 2011 18:10:08 +0530
> >> Amit Shah <address@hidden> wrote:
> [...]
> >> > What's weird though is 'eject' in the monitor makes the cdrom go away
> >> > -- a subsequent mount in the guest results in a no medium error.  I
> >> > thought we had solved that, Markus?
> >> > 
> >> > By not doing a bdrv_close() in the do_eject()->eject_device() call
> >> > path this starts working as expected.
> >> 
> >> Yes, also note that with the -f option eject is capable of purging
> >> any block device. I wonder if libvirt (or any client) relies on this.
> >
> > libvirt will only issue 'eject' on devices which are CDROMs, or Floppy,
> > never hard disks, etc.
> 
> Any use of -f?  Recommend to stay away from it.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=676528

When ejecting CDROM media, there's an option to supply a 'FORCE' flag
to the libvirt API, so media is ejected even if the guest OS has locked
the tray, or is crashed

Regards,
Daniel
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