Ran into this on one of our ESX hosts recently after shutting it down for some maintenance:
* vsd-mount ... [!!]
You have entered the recovery shell. The situation you are in may be recoverable. If you are able to fix this situation the boot process will continue normally after you exit this terminal
/bin/sh: can't access tty; job control turned off
I was unable to get in troubleshooting mode on the ESX box, so I couldn't run any commands of consequence. I perused around and determined pretty quickly that reloading was my quickest and easiest option. After all, we've got a Distributed Switch setup, and the rest are just basics (IP, etc), so it wasn't a very hard decision.