Recommended Setup Parameters | |
Cylinders 1 | 16383 |
Heads | 16 |
Sectors/Track | 63 |
Landing Zone | 16383 |
WPC | 16383 |
Jumper Setting Information | Ten Pin Drive |
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1 All EIDE drives 8.4 GB and larger use 16383 cylinders, 16 heads and 63 SPT due to interface restrictions.
Physical Specifications | |
Formatted Capacity 1 | 40,021 MB |
Interface | 40-pin EIDE (Fast ATA-2?? EIDE is a Western Digitial proprietary specification.) |
Actuator Type | Rotary Voice Coil |
Number of Disks | 2 |
Data Surfaces | 4 |
Number of Heads | 4 |
Bytes Per Sector | 512 |
User Sectors Per Drive | 78,165,360 |
Servo Type | Embedded |
Recording Method EPR4 | Rate 16/17 PRML |
ECC | Reed Solomon |
Head Park 2 | Automatic |
PRML - Partial Response Maximum Likelihood
EIDE - Enhanced Integrated Drive Electronics
1 Western Digital defines a megabyte (MB) as 1,000,000 bytes and a gigabyte (GB) as 1,000,000,000 bytes
2 Turning the system power off causes the WD Caviar® to perform an automatic head park operation.
Performance Specifications | |
Average Seek - Read - Write |
8.9 ms (typical) 18 ms (maximum) 10.9 ms (typical) 20 ms (maximum) |
Track-to-Track Seek | 2.0 ms (typical) 5 ms (maximum) |
Full Stroke Seek | 21 ms (typical) 28 ms (maximum) |
Index Pulse Period | 8.3 ms (nominal) |
Average Latency | 4.2 ms (nominal) |
Rotational Speed | 7200 RPM (nominal) |
Controller Overhead | 0.3 ms average |
Data Transfer Rate (maximum) - Buffer to Host - Buffer to Disk |
100 MB/s (Mode 5 Ultra ATA) [ATA/ATAPI-6] 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) 244 Mbits/s minimum 400 Mbits/s maximum |
Interleave | 1:1 |
Buffer Size | 2 MB |
Error Rate - Unrecoverable | <1 in 1014 bits read |
Spindle Start Time - From Power-on to Drive Ready 1 - From Power-on to Rotational Speed 2 |
5.5 s average, 9s maximum  4.5 s average, 7s maximum  |
Contact Start/Stop Cycles (CSS) | 50,000 minimum |
1 Defined as the time from power-on to the setting of the Drive Ready and Seek Complete including calibration.
2 Defined as the time from power-on to when the full spindle rotational speed is reached.
Physical Dimensions | ||
Height | English: | 1.028 inches max |
Metric: | 26.1 mm max | |
Length | English: | 5.787 inches max |
Metric: | 147.0 mm max | |
Width | English: | 4.00 inches ±0.010 inch |
Metric: | 101.6 mm ±0.25 mm | |
Weight | English: | 1.4 pounds ±0.14 pounds |
Metric: | 0.62 kg ±0.062 kg |
Electrical Specifications | |||
Current Requirements and Power Dissipation | |||
Operating Mode | RMS Current | Power, Typical 1 | |
12 VDC | 5 VDC | ||
Spinup | 1.8 A | 560 mA | 18.4 W |
Read/Write/Idle | 350 mA | 630 mA | 7.5 W |
Seek | 870 mA | 660 mA | 13.7 W |
Power Management Commands | |||
Operating Mode | RMS Current 1 | Power, Typical 1 | |
12 VDC | 5 VDC | ||
Idle (E1H) | 340 mA | 610 mA | 7.1 W |
Standby (E0H) | 25 mA | 190 mA | 1.3 W |
Sleep (E6H) | 25 mA | 80 mA | 0.7 W |
Input Voltage Requirements |
+5.0V (±5%) and 12.0V (±10%) |
Ripple | ||
+12 VDC | +5 VDC | |
Maximum Frequency |
200 mV (double amplitude) 0-30 MHz |
100 mV (double amplitude) 0-30 MHz |
Power Connectors and Cables | |
Power Connector | 4-pin AMP (P/N 84069-1 or equivalent) |
Mating Connector | Body (AMP 1-480424-0 or equivalent) Pins (AMP 60619-4 or equivalent) |
Power Cable Wire Guage | 18 AWG (or heavier) |
1 All values are typical (25°C, 5.0V, and 12V input) except where specified as maximum.
Note: Current measurements cut off frequency at 1 kHz.
Environmental Specifications | ||
Shock 1 | ||
Operating | 65 G, 2 ms (read); 20 G, 2 ms (write) | |
Non-operating | 250 G, 2 ms | |
Vibration | ||
Operating | Linear: 5-500 Hz, 0.25 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 | 0.4 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) 5°C to 65°C (case temp) |
|
Humidity | 5-85% 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 60°C (-40°F to 140°F) | |
Humidity | 5-95% RH non-condensing 33°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 2 | 35 dBA average | |
Seek Mode 0 3 | 37 dBA average | |
Seek Mode 3 3 | 34 dBA average | |
Reliability Specifications | ||
AFR | <0.8% | |
MTBF | 500,000 Power On Hours | |
Component Design Life | 5 years | |
Warranty Period | Warranty Length |
1 Half sine wave, measured without shock isolation
and without non-recoverable errors.
2 No audible pure tones.
3 Random seek at a rate of 26 seeks per second.
this page posted March 2005
lyberty.com