Fujitsu HDD 40 GB AT 2.5" ( MH, 40 GB, 4200 RPM, 2 MB, 2.5", Ultra-ATA/100 Fujitsu HDD 40 GB AT 2.5" ( MH. HDD capacity: 40 GB, HDD speed: 4200 RPM, Storage drive buffer size: 2 MB, HDD size: 2.5", Interface: Ultra-ATA/100