F15 to F16 upgrade via DVD does not recognize previous installation

[Greg Woods]

On Tue, 2011-11-15 at 07:31 -0700, Greg Woods wrote:
> On Tue, 2011-11-15 at 05:21 -0500, Deron Meranda wrote:
> > On Tue, Nov 15, 2011 at 3:00 AM, Deron Meranda <deron.meranda at gmail.com> wrote:
> > > I'm attempting to upgrade a Fedora 15 installation using the F16 DVD.
> > > However anaconda is never giving me a choice to upgrade; instead it
> > 
> > I may be getting hit by bug 748119
> > 
> >    https://bugzilla.redhat.com/show_bug.cgi?id=748119
> > 
> > as my /var is mounted on a different filesystem than /
> 
> I have the same issue, and my /var is also mounted on a separate file
> system

I did get the upgrade to succeed, by using the workaround of
copying /var/lib/rpm to the root partition. But now I have a number of
broken packages that I cannot update. Most of them are qemu packages
that want to install something called "ceph", and that refuses to
install because it requires libunwind.so.7 . What is libunwind and where
do I find it? I tried "yum whatprovides */libunwind*" but there are no
matches.

--Greg