5,400 RPM
2.5-Inch Mobile Hard Disk Drives
MKXX55SX 8/2010
1
One Gigabyte (1 GB) means 10
9
= 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 = 2
30
= 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.
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, Ch 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.
Visit us at:
www.toshibastorage.com
MK1255GSX MK1655GSX MK2555GSX MK3255GSX MK4055GSX MK5055GSX
Series Overview
Drive Capacity
120GB
1
160GB
1
250GB
1
320GB
1
400GB
1
500GB
1
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
3
Low Power Idle
0.6 watts
3
Standby Power
0.18 watts
3
Sleep Power
0.13 watts
3
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)