The Toshiba MK1031GAS is a 100GB 2.5-inch laptop hard drive designed for ultra-slim portable systems. It features a 9.5mm form factor, 4200RPM spindle speed, and 8MB cache buffer. The drive connects via 44-pin IDE/ATA-100 (ATA-6) interface, delivering sustained throughput suitable for legacy laptop and mobile workstation applications. Compatible with late-1990s to mid-2000s notebook computers, this drive is ideal for replacement or archival storage in classic portable systems where compact, low-profile storage is required. The super slimline profile accommodates space-constrained chassis designs common in that generation of mobile hardware. This unit has been tested and guaranteed; available via quote from G5 Network Group.