Seagate ST303204N1A1A-RK 320 GB Ultra ATA/100 Internal Hard Drive 320 GB Ultra ATA/100 internal hard drive delivers high performance and powerful features 16 MB cache buffer; 7200 RPM for fast read/write times Fluid dynamic bearing motor for ultra-quiet operation Includes internal drive, interface cable, interface cable, DiscWizard installation software, SeaTools diagnostic software, quick installation guide, and mounting screws 5-year limited warranty covers parts and labor