Interesting that you bring up this, as I also have had problems with LaCie d2 drives. In my case I had three Quadra quadruple interface drives, and they all failed at some point. The first one was replaced by LaCie, but the replacement eventually failed. I got very discouraged and didn't bother to contact LaCie about the others. Fortunately a coworker with a lot of Mac experience mentioned that it may be the enclosure which is the problem rather than the hard drive inside. I ordered some Vantec hard drive enclosures and transferred the drives from the LaCie enclosures to the new ones. I'm happy to report that in every case the hard drive was perfectly healthy one inside the Vantec enclosures. They come in different flavors, depending if you need USB only, or also need FireWire or (in my case for my PC) eSATA. I've ordered them from both http://www.newegg.com and http://www.provantage.com. You will definitely want a working external drive if you upgrade to Leopard, as it is great for Time Machine backups.