Western Digital Caviar wd3200js 320GB SATA

Key Features

Fast - 8 MB cache - Keeps more of your data in high-speed memory for unsurpassed performance in its class. Fast 7200 RPM spindle speed and next-generation SATA 3 Gb/s interface. For even higher performance, consider WD Caviar SE16 SATA 3 Gb/s hard drives.

Cool - Cool operation results in the highest reliability, even in intensely hot environments such as digital video recorders. That's why these, the coolest on the market, are the drives of choice for the world's leading consumer electronics and PC manufacturers.

Quiet - The technology that Tom's Hardware Guide called "very fast and nearly silent" is used throughout this family of drives. Our WhisperDrive™ technology minimizes noise to levels near the threshold of human hearing. To cut seek noise, SoftSeek™ technology streamlines read/write seeking algorithms, resulting in more efficient operation.

How this WD hard drive protects your data
Data Lifeguard™ is an exclusive set of data protection features, including shock protection, an environmental protection system and real-time embedded error detection and repair. WD's Data Lifeguard technology automatically finds, isolates, and repairs problems that may develop over the life of a hard drive.

Data Lifeguard Tools™ are software utilities designed for WD hard drives that work with the embedded Data Lifeguard features to make hard drive installation,diagnostics and repair both simple and worry-free. (Download Data Lifeguard Tools)

ShockGuard™ instantaneously protects the hard drive against damage from bumps and vibrations while it is running. This technology enables WD Caviar drives to achieve industry-leading shock specifications.

Technical Specifications:

Performance Specifications
	Rotational Speed	7,200 RPM (nominal)
	Buffer Size	8 MB
	Average Latency	4.20 ms (nominal)

Seek Times
	Read Seek Time	8.9 ms
	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)
	Buffer To Disk	748 Mbits/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 (Max)
	Length	5.787 Inches (Max)
	Width	4.00 Inches (+/- 0.010 inch)
	Weight	1.32 Pounds

Metric
	Height	26.1 mm (Max)
	Length	147 mm (Max)
	Width	101.6 mm
	Weight	0.60 kg

Environmental Specifications
Shock
	Operating Shock (Read)	65G, 2 ms
	Non-operating Shock	250G, 2 ms

Acoustics
	Idle Mode	26 dBA (average)
	Seek Mode 0	31 dBA (average)
	Seek Mode 3	27 dBA (average)

Temperature (English)
	Operating	41° F to 131° F
	Non-operating	-40° F to 149° F

Temperature (Metric)
	Operating	5° C to 55° 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, .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	20-500 Hz, 4.0G (0 to peak)

Electrical Specifications
Current Requirements
	12 VDC
	Read/Write	450 mA
	Idle	430 mA
	Standby	20 mA
	Sleep	20 mA

	5 VDC
	Read/Write	800 mA
	Idle	730 mA
	Standby	270 mA
	Sleep	250 mA

	Power Dissipation
	Read/Write	9.50 Watts
	Idle	8.75 Watts
	Standby	1.60 Watts
	Sleep	1.50 Watts