Toshiba MK1655GSX, MK2555GSX, MK5055GSX, MK4055GSX, MK1255GSX User Manual
Hard
Drive
5,400 RPM
2.5-Inch Mobile Hard Disk Drives
MK-55GSX Series oers
up to one half-terabyte in
capacity with quiet acoustics
and enhanced durability
Te MKxx55GSX Series of 5,400 RPM, 2.5-inch hard
disk drives oers up to one-half terabyte in capacity with
quiet acoustics and enhanced durability, providing a solid
storage solution for mobile and stationary PCs, game
consoles, printers, external storage devices as well as set top
boxes, personal video recorders and surveillance systems.
Toshiba’s advanced servo techniques and mechanical design
minimize drive acoustics, making them nearly inaudible
during operation. e 320GB1, 160GB1 and 120GB1 in
particular, perform close to the threshold of human hearing.
Further design optimizations boost the durability of
the MKxx55GSX line-up, providing industry-leading
robustness against shock while the drives are in operation.
An operational free-fall sensor (FFS) feature further protects
the drive and user data against potential damage from
shock, vibration and rough handling. e MKxx55GSX
products support a 3 Gb/sec data transfer rate and have
passed testing by the Serial ATA International Organization
(SATA-IO) for SATA interoperability.
MK5055GSX
MK4055GSX
MK3255GSX
MK2555GSX
MK1655GSX
MK1255GSX
Up to 500GB1 of Storage Capacity
5,400 RPM Spin Speed
3 Gb/sec SATA
Light-weight, Standard 9.5 mm-High Design
Super-quiet Seek Technology
Eco-Conscious and Low Power Design
4
5,400 RPM
2.5-Inch Mobile Hard Disk Drives
MK1255GSX MK1655GSX MK2555GSX MK3255GSX MK4055GSX MK5055GSX
Series Overview
Drive Capacity 120GB1 160GB1 250GB1 320GB1 400GB1 500GB
Drive Interface Serial ATA Revision 2.6 / ATA-8
Number of Platters (disks) 1 1 1 2 2 2
Number of Data Heads 1 2 2 4 4 4
Transfer Rate to Host 3 Gb/sec
Performance
Track-to-track Seek 2ms
Average Seek Time 12ms
Rotational Speed 5,400 RPM
Average Latency 5.55ms
Buffer Size 8MB
2
Power Requirements
Voltage 5V (+/-5%)
Spin up (start) Power 4.5 watts
Seek Power 1.7 watts
Read/Write Power 1.4 watts
Active Idle Power 0.85 watts
Low Power Idle 0.6 watts
Standby Power 0.18 watts
Sleep Power 0.13 watts
3
3
3
3
1
Physical Size
Dimensions (W) x (H) x (D) 69.85 mm (2.75”) x 100 mm (3.94”) x 9.5 mm (0.37”)
Weight 98 g (3.46 oz.)
Environmental
Temp - Operating 5° to 55°C (41° to 131°F)
Temp - Non-Operating -40° to 60°C (-40° to 140°F)
Vibration - Operating 9.8 m/s² (1.0G) 5 to 500 Hz
Vibration - Non-Operating
49 m/s² (5.0G) 49 m/s² (5.0G) 49 m/s² (5.0G) 49 m/s² (5.0G) 49 m/s² (5.0G) 49 m/s² (5.0G)
5 to 500 Hz 15 to 500 Hz 15 to 500 Hz 15 to 500 Hz 15 to 500 Hz 15 to 500 Hz
Shock - Operating 3,920 m/s² (400G) 2ms
Shock - Non-Operating 8,820 m/s² (900G) 1ms
Altitude - Operating -300 to 3,000 m
Acoustics
Acoustics (idle) 1.9 bels 1.9 bels 1.9 bels 2.5 bels 2.5 bels 2.5 bels
Acoustics (seek) 2.0 bels 2.0 bels 2.0 bels 2.5 bels 2.5 bels 2.5 bels
Limited Warranty
Limited Warranty 3 years (from date of purchase)
1
One Gigabyte (1 GB) means 109 = 1,000,000,000 bytes using powers of 10. A computer
operating system, however, reports storage capacity using powers of 2 for the definition of
1 GB = 230 = 1,073,741,824 bytes, and therefore shows less storage capacity. Available storage
capacity will also be less if the computer includes one or more pre-installed operating systems,
pre-installed software applications, or media content. Actual formatted capacity may vary.
2
A small portion of buffer memory is used for drive firmware control.
3
SATA PHY in slumber mode.
Visit us at: www.toshibastorage.com
4
Halogen free as defined by levels of chlorine (CL) and bromine (Br) or a compound in which they
are combined reduced to be less than the standards of IEC61249-2-21:2003, as stated below:
Chlorine: less than 900ppm, Bromine: less than 900ppm, Chlorine + bromine: less than 1500ppm
Subject to Change: While Toshiba has made every effort at the time of publication to ensure the
accuracy of the information provided herein, product specifications, configurations, prices, system/
component/options availability are all subject to change without notice.
© 2009 Toshiba America Information Systems, Inc. All rights reserved.
MKXX55SX 8/2010
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