Gateway 250-GB 7200 RPM Serial ATA Hard Drive - WD2500JD-22HBC0

Feature	Description
Performance
Rotational Speed	7 200 RPM (nominal)
Buffer Size	8 MB
Average Latency	4.20 ms (nominal)
Contact Start/Stop Cycles	50 000 minimum
Read Seek Time (Average)	8.9 ms
Write Seek Time (Average)	10.9 ms (average)
Track-To-Track Seek Time	2.0 ms (average)
Full Stroke Seek	21.0 ms (average)
Buffer To Host Transfer Rate (Serial ATA)	1 200 Mbits/s (Max)
Buffer To Disk Transfer Rate	748 Mbits/s (Max)
Physical
Number of Heads (Physical)	6
Formatted Capacity	250 059 MB
Capacity	250 GB
Interface	SATA
Actuator Type	Rotary Voice Coil
Number of Platters	3
Bytes Per Sector	512
User Sectors Per Drive	488 397 168
Servo Type	Embedded
Dimensions (H × L × W)	1.028 × 5.787 × 4.00 Inches (26.1 × 147 × 101.6 mm)
Weight	1.60 Pounds (0.73 kg)
Environmental
Shock	Operating(Read): 65G 2 ms Non-operating: 250G 2 ms
Acoustics	Idle Mode: 34 dBA (average) Seek Mode 0: 36 dBA (average) Seek Mode 3: 35 dBA (average)
Temperature	Operating: 41° F to 131° F (5° C to 55° C) Non-operating: -40° F to 149° F (-40° C to 65° C)
Relative Humidity (Non-Condensing)	Operating: 5-95% Non-operating: 5-95%
Altitude	Operating: -1 000 feet to 10 000 feet (-305 M to 3 050 M) Non-operating: -1 000 feet to 40 000 feet (-305 M to 12 200 M)
Vibration	Operating: Linear: 20-300 Hz 0.75G (0 to peak) Random: 10-300 Hz 0.004 g2 / Hz Non-operating: Low Frequency: 5-20 Hz 0.195 inches (double amplitude) High Frequency: 10-300 Hz 5.0G (0 to peak)
Current Requirements
12 VDC	Read/Write: 510 mA Idle: 510 mA Standby: 20.5 mA Sleep: 20.5 mA
5 VDC	Read/Write: 575 mA Idle: 550 mA Standby: 200 mA Sleep: 200 mA
Power Dissipation	Read/Write: 9.000 Watts Idle: 8.750 Watts Standby: 1.200 Watts Sleep: 1.200 Watts