1/2 Brief Specification Mobile HDD (2.5-type) MK5055GSX / MK4055GSX / MK3255GSX / MK2555GSX / MK1655GSX / MK1255GSX ITEM MK5055GSX MK4055GSX MK3255GSX Serial ATA 2.6 / ATA8 3.0Gb/s 500GB 4 Serial ATA 2.6 / ATA8 3.0Gb/s 400GB 4 Serial ATA 2.6 / ATA8 3.0Gb/s 320GB 4 2 164,887 512 512 2 151,523 512 512 2 136,152 512 512 976,773,168 781,422,768 625,142,448 Basic specification Interface Interface speed Formatted Capacity Number of data heads Number of disks Number of User data cylinders Bytes per sector (HOST) Bytes per sector (DISK) Logical Blocks (LBA) Maximum areal density Environmental compliance 576.4Mbit/mm2 (371.9Gbit/in2) 473.8Mbit/mm2 (306.0Gbit/in2) 392.4Mbit/mm2 (253.1Gbit/in2) RoHS compliant RoHS compliant RoHS compliant Performance Buffer size Rotation speed Average Latency time Internal transfer rate Average seek time Track to track seek time Max. seek time 8MB 5,400rpm 5.55 ms 363 to 952 Mb/s (typ.) 12ms 2ms 22ms 8MB 5,400rpm 5.55 ms 363 to 952 Mb/s (typ.) 12ms 2ms 22ms 8MB 5,400rpm 5.55 ms 363 to 952 Mb/s (typ.) 12ms 2ms 22ms Reliability Load/Unload Error rate non-recoverable 600,000 times 600,000 times 600,000 times 14 1/10 bit read 1/1014 bit read 1/1014 bit read 5V ±5% 5V ±5% 5V ±5% 4.5W (max.) 1.7W (typ.) 1.4W (typ.) 0.6W (typ.) 0.18W (typ.) 0.13W (typ.) 4.5W (max.) 1.7W (typ.) 1.4W (typ.) 0.6W (typ.) 0.18W (typ.) 0.13W (typ.) 4.5W (max.) 1.7W (typ.) 1.4W (typ.) 0.6W (typ.) 0.18W (typ.) 0.13W (typ.) 0.0012 e 0.0015 e 0.0019 d Supply Voltage Allowable Voltage Power consumption Start Seek Read/Write Low power Idle Stand-by Sleep Energy Consumption Efficiency /Category name Dimension Height 9.5mm 9.5mm 9.5mm Width Depth Weight 69.85mm 100.0mm 101g (typ.) 69.85mm 100.0mm 101g (typ.) 69.85mm 100.0mm 101g (typ.) Temperature Operating Non-Operating Shipping 5 to 55°C 5 to 55°C 5 to 55°C -40 to 60°C -40 to 70°C -40 to 60°C -40 to 70°C -40 to 60°C -40 to 70°C 2 9.8m/s (1.0G) 2 49m/s (5.0G) 9.8m/s2 (1.0G) 49m/s2 (5.0G) 9.8m/s2 (1.0G) 49m/s2 (5.0G) Vibration/Shock Vibration (op) Vibration (non-op) Shock (op) Shock (non-op) 3,920m/s 2 (400G) (2ms half sine) 3,920m/s 2 (400G) (2ms half sine) 3,920m/s 2 (400G) (2ms half sine) 8,820m/s 2 (900G) (1ms half sine) 8,820m/s 2 (900G) (1ms half sine) 8,820m/s 2 (900G) (1ms half sine) Acoustics Idle (ave.) 25dBA 25dBA 25dBA Seek (ave.) 25dBA 25dBA 25dBA *Energy Consumption Efficiency: Energy consumption efficiency is calculated based on power consumption divided by formatted capacity, as defined by Japanese law. *Energy Consumption Efficiency Category name is based on the Standards of Judgment for Factories etc. on the Low Concerning the Rational Use of Energy in Japan, as of FY2007. *Definition of Capacity: TOSHIBA defines a megabyte(MB) as 1,000,000bytes, and a gigabyte(GB) as 1,000,000,000 bytes. 2/2 ITEM MK2555GSX MK1655GSX MK1255GSX Serial ATA 2.6 / ATA8 3.0Gb/s 250GB 2 Serial ATA 2.6 / ATA8 3.0Gb/s 160GB 2 Serial ATA 2.6 / ATA8 3.0Gb/s 120GB 1 1 164,887 512 1 136,152 512 1 164,887 512 512 488,397,168 512 312,581,808 512 234,441,648 Basic specification Interface Interface speed Formatted Capacity Number of data heads Number of disks Number of User data cylinders Bytes per sector (HOST) Bytes per sector (DISK) Logical Blocks (LBA) Maximum areal density Environmental compliance 576.4Mbit/mm2 (371.9Gbit/in2) 392.4Mbit/mm2 (253.1Gbit/in2) 552.6Mbit/mm2 (356.5Gbit/in2) RoHS compliant RoHS compliant RoHS compliant Performance Buffer size Rotation speed Average Latency time Internal transfer rate Average seek time Track to track seek time Max. seek time 8MB 8MB 8MB 5,400rpm 5.55 ms 363 to 952 Mb/s (typ.) 12ms 2ms 22ms 5,400rpm 5.55 ms 363 to 952 Mb/s (typ.) 12ms 2ms 22ms 5,400rpm 5.55 ms 363 to 952 Mb/s (typ.) 12ms 2ms 22ms Reliability Load/Unload Error rate non-recoverable 600,000 times 600,000 times 600,000 times 1/1014 bit read 1/1014 bit read 1/1014 bit read 5V ±5% 5V ±5% 5V ±5% 4.5W (max.) 1.7W (typ.) 1.4W (typ.) 0.6W (typ.) 0.18W (typ.) 0.13W (typ.) 0.0024 d 4.5W (max.) 1.7W (typ.) 1.4W (typ.) 0.6W (typ.) 0.18W (typ.) 0.13W (typ.) 0.0038 d 4.5W (max.) 1.7W (typ.) 1.4W (typ.) 0.6W (typ.) 0.18W (typ.) 0.13W (typ.) 0.0050 d Supply Voltage Allowable Voltage Power consumption Start Seek Read/Write Low power Idle Stand-by Sleep Energy Consumption Efficiency /Category name Dimension Height 9.5mm 9.5mm 9.5mm Width Depth Weight 69.85mm 100.0mm 97g (typ.) 69.85mm 100.0mm 97g (typ.) 69.85mm 100.0mm 97g (typ.) Temperature Operating Non-Operating Shipping 5 to 55°C 5 to 55°C 5 to 55°C -40 to 60°C -40 to 70°C -40 to 60°C -40 to 70°C -40 to 60°C -40 to 70°C 2 9.8m/s (1.0G) 2 49m/s (5.0G) 9.8m/s2 (1.0G) 49m/s2 (5.0G) 9.8m/s2 (1.0G) 49m/s2 (5.0G) Vibration/Shock Vibration (op) Vibration (non-op) Shock (op) Shock (non-op) 3,920m/s 2 (400G) (2ms half sine) 3,920m/s 2 (400G) (2ms half sine) 3,920m/s 2 (400G) (2ms half sine) 8,820m/s 2 (900G) (1ms half sine) 8,820m/s 2 (900G) (1ms half sine) 8,820m/s 2 (900G) (1ms half sine) Acoustics Idle (ave.) 19dBA 19dBA 19dBA Seek (ave.) 20dBA 20dBA 20dBA *Energy Consumption Efficiency: Energy consumption efficiency is calculated based on power consumption divided by formatted capacity, as defined by Japanese law. *Energy Consumption Efficiency Category name is based on the Standards of Judgment for Factories etc. on the Low Concerning the Rational Use of Energy in Japan, as of FY2007. *Definition of Capacity: TOSHIBA defines a megabyte(MB) as 1,000,000bytes, and a gigabyte(GB) as 1,000,000,000 bytes.