|
Specifications for the WD Caviar
AC24300
| Recommended Setup
Parameters |
| Cylinders |
8912 |
| Heads |
15 |
| Sectors/Track |
63 |
| Landing Zone |
8912 |
| WPC |
16383 |
| Jumper Setting Information |
Ten Pin Drive |
 |
| Physical
Specifications |
| Formatted Capacity* |
4,311 MB |
| Interface |
40-pin EIDE |
| Actuator Type |
Rotary Voice Coil |
| Number of Platters |
2 |
| Data Surfaces |
3 |
| Number of Heads |
3 |
| Bytes Per Sector |
512 |
| User Sectors Per Drive |
8,421,840 |
| 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) |
9.5 ms (typical) 15 ms (maximum) |
| Average Seek (Write) |
11.5 ms (typical) 17
ms (maximum) |
| Track to Track Seek |
1.0 ms (typical) 5 ms (maximum) |
| Full Stroke Seek |
20 ms (typical) 23 ms
(maximum) |
| Index Pulse Period |
11.11 (nominal) |
| Average Latency |
5.5 ms (nominal) |
| Rotational Speed |
5400 RPM (nominal) |
| Controller Overhead |
0.3 ms average |
| Transfer Rate (Buffer to Host) |
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) |
87.9 Mbits/s minimum
161.4 Mbits/s maximum |
| Interleave |
1:1 |
| Buffer Size |
512 KB |
| Error Rate (Non-Recoverable) |
<1 in 1013 bits read
|
Spindle Start Time
- From Power-on to Drive Ready*
- From Power-on to Rotational Speed** |
11s typical, 18s maximum
7s typical. 15s maximum |
| Spindle Stop Time |
6s typical |
| 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.
** Defined as the time from power-on to when the full spindle rotational
speed is reached.
| 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 |
English:
1.1 pounds (±0.11 pounds)
Metric:
.500 kg (±0.050 kg)
|
| Electrical
Specifications |
| Current Requirements and
Power Dissipation |
| Operating Mode |
RMS Current*
|
Power, Typical* |
| |
12 VDC |
5 VDC |
|
| Spinup |
1.8 A max |
530 mA |
24.3 W max |
| Read/Write/Idle |
240 mA |
660 mA |
6.18 W |
| Seek |
580 mA |
600 mA |
9.96 W |
| Power
Management Commands |
| Operating Mode |
RMS Current*
|
Power, Typical* |
| |
12 VDC |
5 VDC |
|
| Idle (E1H) |
240 mA |
660 mA |
6.18 W |
| Standby (E0H) |
30 mA |
192 mA |
1.32 W |
| Sleep (E6H) |
30 mA |
96 mA |
0.82 W |
|
Input Voltage Requirements
|
|
+5.0V (±5%) and 12.0V (±8%)
|
| Ripple |
| |
+12 VDC |
+5 VDC |
Maximum
Frequency |
200 mV (double amplitude)
0-20 MHz |
100 mV (double amplitude)
0-20 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 (2 per second maximum)
Non-operating
150 G (3 drops per axis maximum)
|
| Vibration |
Operating
5-20 Hz, 0.037 G (double amplitude)
20-300 Hz, 0.75 G (0 to peak)
Non-operating
5-20 Hz, 0.195 inches (double amplitude)
20-500 Hz, 4.0 G (0 to peak)
Sweep Rate
One-octave/minute minimum
|
| Drive Generated Vibration |
Operating
.10 G maximum with the drive in an unconstrained condition.
|
| Rotational Shock |
Amplitude
12K rad/sec2
Duration
3 ms
|
| Operating Temperature and Humidity |
Temperature
5º C to 55º C (41ºF to 131ºF)
Humidity
5-85% RH non-condensing
33º C (maximum wet bulb)
Thermal Gradient
20°C/hour (maximum)
Humidity Gradient
20%/hour (maximum)
|
| Non-Operating
Temperature and Humidity |
Temperature
-40º C to 60º C (-40ºF to 140ºF)
Humidity
5-95% RH non-condensing
33º 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**
34 dBA (average)
38 dBA (maximum)
Seek Mode***
42 dBA (standard)
46 dBA (sound logic)
|
| Reliability |
AFR
<1.2%
MTBF
400,000 Power On Hours
MTTR
10 minutes (typical)
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.
|
