The HP C2986-60004 is a 2.1GB IDE hard drive designed for use in HP LaserJet 8500 Series printers as an EIO (Enhanced Input/Output) module. This 2.5-inch drive operates at 4200 RPM and connects via IDE interface, providing storage for printer firmware, fonts, and job spooling. Compatible with LaserJet 8500, 8550, and related enterprise-class printer models, the drive supports print-to-disk functionality and enables advanced finishing options. The compact form factor is integrated into the printer's EIO card slot architecture. Typical use cases include document management in high-volume office environments and print queue buffering for networked printing. This refurbished unit has been tested and guaranteed to meet OEM specifications. Available via quote from G5 Network Group.