Hitachi Travelstar 4K120 HTS421280H9AT00 80GB 2.5" 4200RPM 8MB Cache ATA/IDE Internal HDD Hard Disk Drive 0A27467.Product Line Series: Travelstar 4K120Hitachi Model Number: HTS421280H9AT00HGST Part Number: 0A27467Specifications:ModelManufacturer HitachiManufacturer Model # HTS421280H9AT00Product Line TravelstarProduct Series 4K120PerformanceProduct Type Internal Hard DriveForm Factor 2.5-inchCapacity 80 GBCache 8 MBSpindle Speed 4200 RPMAverage Seek Time 11 msDrive Interface Type IDE/ATA100Features - TrueTrack Servo Technology- Fluid Dynamic Bearing (FDB) Motor- Adaptive Battery Life Extender (ABLE)- Hitachi Voltage Efficiency Regulator Technology (HiVERT)