Using the Partition Editor

The file manager (Nautilus) currently does not support renaming disk partitions, but Gnome's Partition Editor (GParted) does. To change a partition's label, follow these directions. (Be careful using Partition Editor, as it's capable of making your computer completely unusable if you do the wrong thing.)

1. Open the System > Administration menu and see if there's an entry for GParted (previously Partition Editor).
2. If there is, launch it. If there isn't, install the "gparted" package and it should now appear in the menu. Enter your password when prompted.
3. Disk drives are divided up into partitions. To find the partition you want to re-label, you first have to find the disk drive that contains it, using the drop-down menu in the upper right. It will show a device name like /dev/sdb and the drive's total size in parentheses. After selecting a drive, you will see a list of all partitions on that drive.
4. If the partition is mounted (has a key icon next to it), right-click on the partition and select Unmount.
5. With the key icon gone, right-click on the partition and select Label. If you can't select it, install the ntfsprogs package.
6. Enter the new partition name and press Ok.
7. The label change is now pending, but has not been completed. Press the Apply button near the top of the window. After confirming, it should say "All operations successfully completed". The drive now has a new label.