|
Specifications for the WD Caviar
AC420400
| Recommended Setup
Parameters |
| Cylinders* |
16383 |
| Heads |
16 |
| Sectors/Track |
63 |
| Landing Zone |
16383 |
| WPC |
16383 |
| Jumper Setting Information |
Nine Pin Drive |
 |
* All EIDE drives 8.4 GB and larger use 16383 cylinders, 16 heads and 63
SPT due to interface restrictions.
| Physical
Specifications |
| Formatted Capacity* |
20,416 MB |
| Interface |
40-pin EIDE |
| Actuator Type |
Rotary Voice Coil |
| Number of Platters |
4 |
| Data Surfaces |
8 |
| Number of Heads |
8 |
| Bytes Per Sector |
512 |
| User Sectors Per Drive |
39,876,480 |
| Servo Type |
Embedded |
| Recording Method |
Rate 16/17 PRML |
| ECC |
Reed Solomon |
| Head Park** |
Automatic |
* Western Digital defines a megabyte (MB) as 1,000,000 bytes and a
gigabyte (GB) as 1,000,000,000 bytes
** Turning the system power off causes the WD Caviar to perform an
automatic head park operation.
| Performance
Specifications |
| Average Seek (Read) |
9 ms (typical) 9.5 ms (maximum) |
| Average Seek (Write) |
9.5 ms (typical) 10.5 ms (maximum) |
| Track to Track Seek |
2.2 ms (typical) 2.9 ms (maximum) |
| Full Stroke Seek (Read) |
15.5 ms (typical) 18 ms (maximum) |
| Full Stroke Seek (Write) |
16 ms (typical) 19 ms (maximum) |
| Index Pulse Period |
11.11 (nominal) |
| Average Latency |
5.56 ms (nominal) |
| Rotational Speed |
5400 RPM (nominal) |
| Transfer Rate (Buffer to Host) |
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) |
| Transfer Rate (Buffer to Disk) |
111.37 Mbits/s minimum
196.08 Mbits/s maximum |
| Interleave |
1:1 |
| Buffer Size |
2 MB |
| Error Rate (Non-Recoverable) |
<1 in 1013 bits read |
Spindle Start Time
- From Power-on to Drive Ready* |
13s typical, 31s maximum |
| Contact Start/Stop Cycles (CSS) |
40,000 minimum |
* Defined as the time from power-on to the setting of the Drive Ready and
Seek Complete including calibration.
| Physical Dimensions |
| Height |
English:
1.00 inch (±0.02 inch)
Metric:
25.4 mm (±0.40 mm) |
| Length |
English:
5.75 inches (±0.02 inch)
Metric:
146.05 mm (±0.60 mm) |
| Width |
English:
4.00 inches (±0.02 inch)
Metric:
101.6 mm (±0.40 mm) |
| Weight (min) |
English:
1.23 pounds
Metric:
.56 kg |
| Weight (max) |
English:
1.38 pounds
Metric:
.63 kg |
| Electrical
Specifications |
| Current Requirements and
Power Dissipation |
| Operating Mode |
RMS Current* |
Power, Typical* |
| |
12 VDC |
5 VDC |
|
| Spinup |
2.0 A max |
650 mA |
27.25 W max |
| Read/Write/Idle |
400 mA |
350 mA |
8.7 W |
| Seek |
440 mA |
280 mA |
10.1 W |
| Power Management
Commands |
| Operating Mode |
RMS Current* |
Power, Typical* |
| |
12 VDC |
5 VDC |
|
| Idle (E1H) |
260 mA |
240 mA |
4.9 W |
| Standby (E0H) |
9 mA |
130 mA |
0.76 W |
| Sleep (E6H) |
7 mA |
52 mA |
0.35 W |
| Input Voltage Requirements |
| +5.0V (±5%) and 12.0V (±8%) |
| Ripple |
| |
+12 VDC |
+5 VDC |
Maximum
Frequency |
150 mV (double amplitude)
0-10 MHz |
100 mV (double amplitude)
0-10 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) |
* 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:* |
Operating
10 G (2 per minute maximum, half sine wave 11 ms)
65 G (2 per minute maximum, half sine wave 2 ms)
Non-operating
75 G (3 drops per axis maximum, half sine wave 11 ms)
175 G (3 drops per axis maximum, half sine wave 2 ms) |
| Vibration |
Operating
5-300 Hz, 0.5 G (0 to peak)
Non-operating
5-500 Hz, 2.0 G (0 to peak)
Sweep Rate
One-half octave/minute |
| Rotational Shock |
Amplitude
18K rad/sec2
Duration
2 ms |
| Operating Temperature and Humidity |
Temperature
5ºC to 55ºC (41ºF to 131ºF)
Humidity
8-90% RH non-condensing
29.4ºC (maximum wet bulb)
Thermal Gradient
15°C/hour (maximum) |
| Non-Operating Temperature and Humidity |
Temperature
-40ºC to 65ºC (-40ºF to 149ºF)
Humidity
5-95% RH non-condensing
35ºC (maximum wet bulb)
Thermal Gradient
15°C/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**
35 dBA (average)
38 dBA (maximum)
Seek Mode***
42 dBA (average)
45 dBA (maximum) |
| Reliability |
AFR
<1%
MTBF
750,000 Power On Hours
Component Design Life
5 years
Warranty Period
Warranty Status |
* 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.
|
