Other Help Topics :: fs type Linux not supported by kernel

I've been attempting to create and mount a "writeable partition on my harddrive for 3 hours....i keep getting the error fs type Linux not supported by kernel ......If i don't specify the fs type i get the error .......you must specify the system file type........
what am i doing wrong? will somebody plz explain how to create a mountable partition.?

mke2fs /dev/foobar

a little more info...
You created a partition of the type "linux", but it has not yet been formatted. The command SU gave will format the partition with the ext2 filesystem.

original here.