WDC 3,5" 320 GB Sata 7200 Rpm 16 MB

WD Caviar Blue 320 GB SATA Hard Drives ( WD3200AAKS)

Performance Specifications
	Rotational Speed	7,200 RPM (nominal)
	Buffer Size	16 MB
	Average Latency	4.20 ms (nominal)
	Load/unload Cycles	50,000 minimum

Seek Times
	Read Seek Time	8.9 ms
	Write Seek Time	10.9 ms (average)
	Track-To-Track Seek Time	2.0 ms (average)
	Full Stroke Seek	21.0 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
	User Sectors Per Drive	625,142,448

Physical Dimensions
English
	Height	1.028 Inches
	Depth	5.787 Inches
	Width	4.00 Inches
	Weight	1.33 Pounds

Metric
	Height	25.4 mm
	Depth	147 mm
	Width	101.6 mm
	Weight	0.60 kg

Environmental Specifications
Shock
	Operating Shock (Read)	65G, 2 ms
	Non-operating Shock	350G, 2 ms

Acoustics
	Idle Mode	25 dBA (average)
	Seek Mode 0	29 dBA (average)
	Seek Mode 3	26 dBA (average)

Temperature (English)
	Operating	32° F to 140° F
	Non-operating	-40° F to 149° F

Temperature (Metric)
	Operating	-0° C to 60° C
	Non-operating	-40° C to 65° C

Humidity
	Operating	5-95% RH 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
	Linear	20-300 Hz, 0.75 G (0 to peak)
	Random	7-500 Hz (0.00221 g² / Hz)

	Non-operating
	Low Frequency	10-300 Hz, 0.195 inches (double amplitude)
	High Frequency	300-500 Hz, 5.0G (0 to peak)

Electrical Specifications
Current Requirements
	12 VDC
	Read/Write	395 mA
	Idle	380 mA
	Standby	6 mA
	Sleep	6 mA

	5 VDC
	Read/Write	660 mA
	Idle	532 mA
	Standby	180 mA
	Sleep	180 mA

	Power Dissipation
	Read/Write	7.80 Watts
	Idle	7.20 Watts
	Standby	0.97 Watts
	Sleep	0.97 Watts