From the HDA desktop (or using VNC), [[Open Terminal as root]] and type '''gparted''' to launch the GParted application.
Select the device (/dev/sdX) that you found above.<br/>
In the above example, /dev/sdb would be what I would select in GParted.
There are many easy to follow guides online on how to use GParted. You should Google for one, to find one that seems clear to you.<br/>
[http://www.mepisguides.com/Mepis-6/Install/gparted/gparted-set-partition.html Here's one] that looks simple. Just use ext3 instead of fat32 in you follow that tutorial.
Note that gparted supports GUID-partitioned drives, however, these directions and script do not support it at the moment.
==Using cfdisk==
From a [[Open Terminal as root|terminal, as root]], type '''cfdisk /dev/sdX''' to launch the cfdisk application.
If you have a GUID-partitioned drive, cfdisk will complain. GUID partitions are not supported.
Make sure to replace /dev/sdX with the actual device (eg. /dev/sdb) that you found above.