you can, but there is no point, if you have no filing system, you cant save data.
if you have a corrupt partition, you can use the hdd manufacturer tools to try to repair it. i would suggest if you do t hst that you ghost your info over to another drive.
or, take another drive (a), partition it, do a "partition to partition" ghost (from

, take a, and do an OS repair on it, and see if that is enough to fix it. if so ghost (mirror) "a" back to "b" and boot.
questions? lol