Toshiba Mk1255Gsx Specification Sheet

2014-12-13

: Toshiba Toshiba-Mk1255Gsx-Specification-Sheet-128405 toshiba-mk1255gsx-specification-sheet-128405 toshiba pdf

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5,400 RPM
2.5-Inch Mobile Hard Disk Drives

MK-55GSX Series offers
up to one half-terabyte in

MK5055GSX
MK4055GSX
MK3255GSX
MK2555GSX
MK1655GSX
MK1255GSX

capacity with quiet acoustics
and enhanced durability

TThe MKxx55GSX Series of 5,400 RPM, 2.5-inch hard
disk drives offers 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. The 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. The 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.

	 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 Design4

Hard Drive

5,400 RPM
2.5-Inch Mobile Hard Disk Drives
		

Series Overview	
	
	
	

	
	

MK1255GSX	 MK1655GSX	 MK2555GSX	 MK3255GSX	 MK4055GSX	 MK5055GSX

Drive Capacity	
Drive Interface	
Number of Platters (disks)	
Number of Data Heads	
Transfer Rate to Host	

120GB1	

160GB1	

1	
1	

1	
2	

250GB1		 320GB1	
Serial ATA Revision 2.6 / ATA-8
1		
2	
2		
4	
3 Gb/sec

400GB1	

500GB1

2	
4	

2
4

Performance	
	
	
	
	
	

Track-to-track Seek	
Average Seek Time	
Rotational Speed	
Average Latency	
Buffer Size	

2ms
12ms
5,400 RPM
5.55ms
8MB2

Power Requirements	
	
	
	
	
	
	
	
	

Voltage	
Spin up (start) Power	
Seek Power	
Read/Write Power	
Active Idle Power	
Low Power Idle	
Standby Power	
Sleep Power	

5V (+/-5%)
4.5 watts
1.7 watts
1.4 watts
0.85 watts3
0.6 watts3
0.18 watts3
0.13 watts3

Physical Size	
	
	

Dimensions (W) x (H) x (D)	
Weight	

69.85 mm (2.75”) x 100 mm (3.94”) x 9.5 mm (0.37”)
98 g (3.46 oz.)

Environmental	
	

Temp - Operating	
	
Temp - Non-Operating	
	
Vibration - Operating	
	
Vibration - Non-Operating	
		
	
Shock - Operating	
	
	

Shock - Non-Operating	
Altitude - Operating	

	

Acoustics (idle)	
Acoustics (seek)	

5° to 55°C (41° to 131°F)
-40° to 60°C (-40° to 140°F)
9.8 m/s² (1.0G) 5 to 500 Hz
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
3,920 m/s² (400G) 2ms
8,820 m/s² (900G) 1ms
-300 to 3,000 m

	
Acoustics	
	

1.9 bels 	
2.0 bels 	

1.9 bels	
2.0 bels	

Limited Warranty	
	

Limited Warranty	

1.9 bels	
2.0 bels	

2.5 bels	
2.5 bels	

2.5 bels	
2.5 bels	

2.5 bels
2.5 bels

	
3 years (from date of purchase)

Visit us at: www.toshibastorage.com
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
3

A small portion of buffer memory is used for drive firmware control.
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, 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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