WD Scorpio Black 320 GB SATA Hard Drives ( WD3200BEKT)

Performance Specifications
	Rotational Speed	7,200 RPM (nominal)
	Buffer Size	16 MB
	Average Latency	4.20 ms (nominal)

Seek Times
	Read Seek Time	12.0 ms
	Track-To-Track Seek Time	2.0 ms (average)

Transfer Rates
	Buffer To Host (Serial ATA)	3 Gb/s (Max)

Physical Specifications
	Formatted Capacity	320,072 MB
	Capacity	320 GB
	Interface	SATA 3 Gb/s

Physical Dimensions
English
	Height	0.374 Inches
	Depth	3.94 Inches
	Width	2.75 Inches
	Weight	0.22 Pounds

Metric
	Height	9.5 mm
	Depth	100 mm
	Width	69.85 mm
	Weight	99 g

Environmental Specifications
Shock
	Operating Shock (Read)	350G, 2ms
	Non-operating Shock	1000G, 2 ms

Acoustics
	Idle Mode	28 dBA (average)
	Seek Mode 0	25 dBA (average)

Temperature (English)
	Operating	32° F to 140° F
	Non-operating	-40° F to 158° F

Temperature (Metric)
	Operating	-0° C to 60° C
	Non-operating	-40° C to 70° C

Humidity
	Operating	8% to 95% Non-condensing
	Non-operating	5-95% RH non-condensing

Altitude (English)
	Operating	-1,000 feet to 10,000 feet
	Non-operating	-1,000 feet to 40,000 feet

Altitude (Metric)
	Operating	-305M to 3,050M
	Non-operating	-305M to 12,200M

Vibration
	Operating	0.00459 g2/Hz (10 to 500 Hz)
	Non-operating	0.05102 g2/Hz (10 to 500 Hz)

Electrical Specifications
Current Requirements
	5 VDC
	Read/Write	500 mA
	Idle	400 mA
	Standby	50 mA
	Sleep	30 mA

	Power Dissipation
	Read/Write	2.50 Watts
	Idle	0.85 Watts
	Standby	0.25 Watts
	Sleep	0.15 Watts