I purchased a 1T external WD today as a backup drive for a client. Annoyingly, a "WD SmartWare" CD-style mount displays whenever the drive pops up. It is completely locked, unchangeable.
So I went to the WD site: they had instructions, but they did not work. They had an updated firmware updater, it did not work (the deal is this is not actually a partitiion, it is part of the firmware that BEHAVES like a virtual CD - it's so that you'll always have THEIR handy-dandy backup stuff, oh, and logo, on your desktop, BTW).
Whether Windows or Mac, there is no removing it, because it's a WD problem. Check this thread that outlines the angst and frustration of several users on both sides of the aisle trying to remove it:
http://superuser.com/questions/44318/how-do-i-remove-a-mybooks-wd-smartware-virtual-cd-from-my-desktopif you can believe it, the only satisfactory answer was to write a tiny Applescript that pops on the onMount event ... then dismounts the the virtual cd. So you don't see it, but your system is thrashing because about 2 seconds after you dismount it, it mounts again. As part of the firmware on the drive, it is untouchable by drive partitioning agents, disk managers or anything. It is an absolute Charlie Foxtrot.
Fair warning. You may resume party,
/perk