My drive also failed in my z558. For $30 on newegg with shipping, you can get a far superior drive.
http://www.newegg.com/Product/Product.aspx?Item=N82E16827136153
My Custom HTPC:
Silverstone LC16B-MR
Intel Core 2 Quad - Q9550
Arctic Cooling Freezer7
Asus - P5QL-E
Corsair HX520W
4GB GEIL DDR2-1066
Palit HD 4850
Hitachi 1TB
BD-RE: LG GBW-H20L
Hauppauge HD PVR
Vista HPrm x64