i have installed ubuntu inside windows and then afterwords i installed fedora 16...all time during start up its show os selection by grub loader but after i did some partition on windows its shows error:unknown filesystem.enterting rescue mode..
I did a dumb thing... I forgot that Ubuntu 10.04 (Lucid) switched to Grub2 which puts a ton of *.mod files (kernel modules) in /boot/grub. I thought they were soundtrack files put there erroneously and moved them. Needless to say, the next reboot was traumatic. I was presented with something I had no memory of ever seeing...
My Ubuntu 10.10 system suddenly froze/crashed for no reason and I had to hard reboot my computer. Surprisingly it doesn't load anymore and stay stuck on a grub rescue prompt after an "unknown filesystem" message.
My computer has (had) a dual boot of Ubuntu Precise and Windows 7. Recently, when I started the computer, grub gave me an error saying "Unknown filesystem", and sent me to grub rescue. I searched for solutions to this, and found this answer: Unknown filesystem error: grub rescue.
I am using windows 7 ultimate and Ubuntu in my home desktop.
When my local disks were about to get filled up, I tried to delete the Ubuntu partition. I did it from windows. I right clicked on my computer->manage and partitioned. I deleted the Ubuntu partition and some local disks and then I repartitioned my harddrive.
I used my computer for about 2 hours and then shut it down.