Original HITACHI 40GB IDE HARD DRIVE MH17951 HP ZV5000 ZV5316us  This was pulled from  HP ZV5316us laptop in great working condition Still has the operating system in it as you can see from the last picture. If you have the  HP ZV5316us then all you need is to just install the hard drive. For other models and other laptops that take the IDE interface, you need to reformat  the hard drive.   USED ==Guaranteed to work fine.  DOA Warranty, Money Back Guaranteed.   If for some reason you are not satisfied with received item, e-mail us through eBay message system. Don't leave negative feedback, money back guaranteed! We value your time and business. Auction is for the Hard Drive ONLY. NOTHING ELSE