I have experienced this problem with grub failing to load after an
unclean shutdown. It happened on a cluster running debian etch. Whenever
there is a power outage, *some* nodes fail to boot. Connecting to their
console shows that they hang when loading grub.
I had got around the issue by just bypassing grub altogether and
pxe-booting the nodes from the server. Before that, either a
grub-install, or a journal recovery seemed to fix the system till the
next unclean mount.
--
Raj Kiran Grandhi
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