I have lost my power cord to my LaCie DVD+RW Dual Layer....
Here is the PDF Users Manual for the LaCie DVD+RW 301230U
external optical drive,
(Give it at least 10 seconds to download)
Should the direct link above not work for you, you can download the Users Manual from here,
Go down to the bottom of the page, and under the green -> Download Now <- heading, click on -> User Manual
The reason I posted the link to the User Manual, is that you can use a USB to USB cable for power. You plug one end of the USB cable, into an available USB port on your computer, and the other end, into the LaCie DVD+RW external optical drive. (You need two available USB ports on your computer. One for power, and one to connect the LaCie external optical drive. This USB cable, is called an Interface cable)
The USB end, that goes into your computer, (Laptop or Desktop computer), is the USB A style end. (Male) This is what it looks like,
The USB end, that plugs into the Lacie optical burner drive, is a USB Mini-B style end. (Male) It looks like this,
It is the second one from the left side.
Where I'm at, we have Walmart stores. At Walmart they sell a USB adapter kit, made by Philips. This kit has a USB A to USB A cable, that both ends are Male. This cable is on a little retractable reel. The reel is about the size of a USA fifty cent piece. In the kit are five different styles of USB adapter ends. They just plug on that USB A to USB A style cable. (On the small reel) One of those adapter ends is a Mini-B USB male end. It has a Female USB A socket on one side, and a Male USB MIni-B end, on the other side. The kit sells for about $12 dollars.
Should you find that somehow, this USB power cable does not give enough power to your LaCie external optical burner drive, then here is LaCie.com, Products, Support & Downloads, and the Power Supply, for your LaCie DVD+RW 301230U external optical drive,