sudo fdisk -l(For posterity.) I forget this command.
And. Well. Forgetting this command is a little more understandable (I use it to mount my NTFS drive):
sudo mount /dev/hdb1 /media/kat120data/ -t ntfs -o nls=utf8,umask=0222(all one line)
For those of you who don't know, drives connected with an IDE cable are listed as hda, hdb, (etc.) Their partitions have a number... for example, hda1, hda2, hda3... Drives that are connected via USB (external) or SATA (internal) connectors are labeled with 's', for example: sda1. There are a lot more filesystems than this, and they require different commands for mounting properly.
Be warned that NTFS drives (formatted under Windows NT or Windows 2000) don't necessarily have reliable write access under Linux. They're working on it. You can install some packages to mess around with it. Hard drives formatted with FAT32 (Windows XP, Windows 98, Windows 95...) have reliable read/write access when mounted in Linux.
Because of ext3 (Linux filesystem) benefits, I was really wound up to format my new USB external hard drive in ext3. Upon opening the box and reading the documentation, it is already formatted in FAT32. I've decided to leave it this way because I want my friends to be able to easily read the data off my drive (in case I cart it over to their place). Windows and ext3 don't intrinsically get along.
Most of us have only heard about FAT32 and NTFS, but the amount of computer filesystems is huge.