I've upgraded our server's system from Lucid to Precise and as far as I can tell, it left the system in an un-bootable state. I've read many responses in different threads but my problem has a twist.
When we boot the server, it says
The disc drive for / is not ready yet or not present Continue to wait; or press S to skip mounting or M for manual recovery
but when I press any of those buttons, it doesn't do anything. I can't boot to any recovery console, and as it is a server and I'm accessing it via iDRAC, there's not much I can do.