Startup issues - Filesystem won't mount

[Ocifer]

Hi All,

I'm having some trouble with my Ubuntu 10.04. It had been working normally, and now my startup isn't occurring normally. The bootloader shows my Windows install and two different revisions of Ubuntu. Upon letting it load Ubuntu, however, it goes to BusyBox v1.13.3 and says "built in shell (ash)" and presents me with a functioning command line.

I'm comfortable with working on the command line, but does anyone know where to start with this?

[Ocifer]

I have a bit more information. Upon attempting normal start-up I am faced with the following messages before it goes to BusyBox. I had to copy them to a sheet of paper so they are near exact

mount: mounting /dev/disk/by-uuid/80fbafae-fe17-cco1...  on /root failed: Invalid argument

mount: mounting /dev on /root/dev failed: no such file or directory
mount: mounting /sys on /root/sys failed: no such file or directory
mount: mounting /proc on /root/proc failed: no such file or directory

Target filesystem doesn't have /sbin/init
No init found. Try passing init = bootarg

[sam619]

can you quote the two different boot options for Ubuntu,
apart from the normal one.