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Fixing a broken Xen DomU after upgrading to Ubuntu 11.4 (Natty)

My Xen DomU’s that I upgraded to 11.4 no longer booted, because the xen-blkfront module is missing from the initramfs. To fix, do this when you get the initramfs prompt:

modprobe xen-blkfront
exit

Then after it’s booted:

root@ubuntu:~# echo "xen-blkfront" >> /etc/initramfs-tools/modules
root@ubuntu:~# update-initramfs -u 

Source.

Also look at this post.


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