Western Digital Caviar Blue WD3200AAJB 320GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Internal Hard Drive

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Home > Hard Drives > Internal Hard Drives > IDE > 250GB-320GB > Western Digital Caviar Blue WD3200AAJB 320GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Internal Hard Drive

Western Digital Caviar Blue WD3200AAJB 320GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Internal Hard Drive

Physical Specifications

Formatted Capacity: 320,072 MB*

Interface: 40-pin EIDE

Actuator Type: Rotary Voice Coil

Bytes Per Sector: 512

User Sectors Per Drive: 625,142,448

Servo Type: Embedded

ECC: Reed Solomon

Head Park: Automatic**
*Western Digital defines a megabyte (MB) as 1,000,000 bytes
**Turning the system power off causes the WD Caviar® to perform an automatic head park operation.

Performance Specifications

Average Seek: Read 8.9 ms (average), Write:10.9 ms (average)

Track-to-Track Seek: 2.0 ms (average)

Full Stroke Seek: 21 ms (average)

Index Pulse Period: 8.3 ms (nominal)

Average Latency: 4.2 ms (nominal)

Rotational Speed: 7200 RPM (nominal)

Buffer to Host Transfer Rate (maximum)
- 100 MB/s (Mode 5 Ultra ATA)
- 66.6 MB/s (Mode 4 Ultra ATA)
- 33.3 MB/s (Mode 2 Ultra ATA)
- 16.6 MB/s (Mode 4 PIO)
- 16.6 MB/s (Mode 2 multi-word DMA)

Buffer to Disk Transfer Rate (maximum): 748 Mbits/s maximum

Interleave: 1:1

Buffer Size: 8 MB

Error Rate - Unrecoverable: less than 1 in 10^14 bits read

Spindle Start Time
-From Power-on to Drive Ready: 9.0 s average*
-From Power-on to Rotational Speed: 7.0 s average**

Spindle Stop Time: 8.0 s average

Contact Start/Stop Cycles (CSS): 50,000 minimum
*Defined as the time from power-on to the setting of the Drive Ready and Seek Complete including calibration.
**Defined as the time from power-on to when the full spindle rotational speed is reached.

Shock*

Operating:
- 30 G, 2 ms (write)
- 65 G, 2 ms (read)

Non-operating: 250 G, 2 ms

Vibration

Operating:
- Linear: 20-300 Hz, 0.75 G (0 to peak)
- Random: 10-300 Hz, 0.004 g2/Hz

Non-operating:
- 5-20 Hz, 0.195 inches (double amplitude)
- 20-500 Hz, 4.0 G (0 to peak)

Sweep Rate: 0.5 octave/minute minimum

Drive Generated Vibration

Operating: 0.2 gm-mm typical with the drive in an unconstrained condition

Rotational Shock Non-Operating

Amplitude: 20 K rad/sec2

Duration: 2 ms

Operating Temperature and Humidity

Temperature: 5°C to 55°C (41°F to 131°F)

Humidity: 5-95% RH non-condensing, 33°C (maximum wet bulb)

Thermal Gradient: 20°C/hour (maximum)

Humidity Gradient: 20%/hour (maximum)

Non-Operating Temperature and Humidity

Temperature: -40°C to 65°C (-40°F to 149°F)

Humidity: 5-95% RH non-condensing, 35°C (maximum wet bulb)

Thermal Gradient: 30°C/hour (maximum)

Humidity Gradient: 20%/hour (maximum)

Altitude

Operating: -1000 feet to 10,000 feet (-305M to 3,050M)

Non-Operating: -1000 feet to 40,000 feet (-305M to 12,200M)

Acoustics

Idle Mode: 28 dBA average**

Seek Mode 0: 33 dBA average***

Seek Mode 3: 29 dBA average***

Reliability Specifications

AFR: less than 0.5%

Component Design Life: 5 years

*Half sine wave, measured without shock isolation and without non-recoverable errors.
**No audible pure tones.
***Random seek at a rate of 26 seeks per second.

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