Brief Specification Mobile HDD (1.8-type) MK2431GAH / MK1231GAL / MK8031GAL ITEM MK2431GAH MK1231GAL MK8031GAL ATA-3 / ATA-4 100MB/s 240GB 4 2 112,140 512 4096 468,862,128 ATA-3 / ATA-4 100MB/s 120GB 2 1 112,140 512 4096 234,441,648 ATA-3 / ATA-4 100MB/s 80GB 2 1 112,140 512 4096 156,301,488 531.9Mbit/mm2 (344Gbit/in2) RoHS compliant 531.9Mbit/mm2 (344Gbit/in2) RoHS compliant 354.0Mbit/mm2 (229Gbit/in2) RoHS compliant 8MB 4,200rpm 7.14 ms 238 to 488 Mb/s (typ.) 15ms 3ms 26ms 8MB 4,200rpm 7.14 ms 238 to 488 Mb/s (typ.) 15ms 3ms 26ms 8MB 4,200rpm 7.14 ms 159 to 324 Mb/s (typ.) 15ms 3ms 26ms 600,000 times 600,000 times 600,000 times 1/1013 bit read 1/1013 bit read 1/1013 bit read 3.3 V ±5% 3.3 V ±5% 3.3 V ±5% 1.8W (max.) 0.9W (typ.) 0.8W (typ.) 0.3W (typ.) 0.1W (typ.) 0.07W (typ.) 0.0013 L 1.8W (max.) 0.9W (typ.) 0.8W (typ.) 0.3W (typ.) 0.1W (typ.) 0.07W (typ.) 0.0025 K 1.8W (max.) 0.9W (typ.) 0.8W (typ.) 0.3W (typ.) 0.1W (typ.) 0.07W (typ.) 0.0038 K 8.0mm 54.0mm 71mm 59g (max.) 5.0mm 54.0mm 71mm 48g (max.) 5.0mm 54.0mm 71mm 48g (max.) 5 to 60°C -20 to 65°C -40 to 70°C 5 to 60°C -20 to 65°C -40 to 70°C 5 to 60°C -20 to 65°C -40 to 70°C 19.6m/s2 (2.0G) 49m/s2 (5.0G) 4,900m/s2 (500G) (2ms half sine) 19.6m/s2 (2.0G) 49m/s2 (5.0G) 5,880m/s2 (600G) (2ms half sine) 19.6m/s2 (2.0G) 49m/s2 (5.0G) 5,880m/s2 (600G) (2ms half sine) 14,700m/s2 (1500G) (1ms half sine) 14,700m/s2 (1500G) (1ms half sine) 14,700m/s2 (1500G) (1ms half sine) 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 Performance Buffer size Rotation speed Average Latency time Internal transfer rate Average seek time Track to track seek time Max. seek time Reliability Load/Unload Error rate non-recoverable Supply Voltage Allowable Voltage Power consumption Start Seek Read/Write Low power Idle Stand-by Sleep Energy Consumption Efficiency /Category name Dimension Height Width Depth Weight Temperature Operating Non-Operating Shipping Vibration/Shock Vibration (op) Vibration (non-op) Shock (op) Shock (non-op) Acoustics Idle (ave.) 16dB 14dB 14dB Seek (ave.) 22dB 20dB 20dB *Energy Consumption Efficiency: Energy consumption efficiency is calculated based on power consumption divided by formatted capacity, as defined by Japanese law. *Definition of Capacity: TOSHIBA defines a megabyte(MB) as 1,000,000bytes, and a gigabyte(GB) as 1,000,000,000 bytes.