Short Video on How to Dump your Drive key on Liteon 9504/0272 or 0225 Drives. Not The best but it give you an idea on how to do it and what it looks like.
Things You Need:
1.VIA6421 PCI controller Card (http://www.ebay.com/itm/120673304310?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_3366wt_1131)
2.USB to IDE/Sata cable
3.PC (With PCI Slot on Board)
4.Liteon 9504/0272 or 0225 Drive
If you want more info check the link below just skip the part of the SPI Unlocking unless u want to do that and if your drive is compatible.
http://www.xbox360iso.com/slim-drive-lite-t452950.html
Also its said that turning on the xbox360 with out the drive plugged it,Might result in a BAN from MS. Not sure if it is true or not but if you don't care of LIVE that you should be ok to do this.
www.psconsoles.com