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Specifications for the WD Enterprise
WDE9100
Ultra SCSI Hard Drive
| Standard Models |
Model
Numbers |
Interface |
Cache |
|
WDE9100-0003 |
Ultra-SCSI Single-ended 50-pin Narrow |
512 KB |
|
WDE9100-0007 |
Ultra-SCSI Single-ended 68-pin Wide |
512 KB |
|
WDE9100-0008 |
Ultra-SCSI Single-ended 80-pin Wide |
512 KB |
| AV Optimized Models |
| Model Numbers |
Interface |
Cache |
| WDE9100-AV0016 |
Ultra-SCSI / Ultra2 SCSI 68-pin |
1 MB |
| WDE9100-AV0017 |
Ultra-SCSI / Ultra2 SCSI 80-pin |
1 MB |
| Physical
Specifications |
| Formatted Capacity* |
9,105 MB |
| Interfaces |
Ultra Fast SCSI
(50-pin)
Ultra Fast Wide
(68-pin)
(80-pin SCA-2) |
| Media Type |
Thin Film |
| Head Type |
MR |
| Servo Type |
Embedded |
| Number of Disks |
6 |
| Number of Data Surfaces |
12 |
| Number of Heads |
12 |
| Bytes per Sector |
512 |
| Tracks per Inch |
7500 |
| Bits per Inch (000) |
146 (ID), 121 (OD) |
| Areal Density |
1.10 Gb/in2 |
| Total Cylinders |
6,932 |
| Zones per Surface |
16 |
| User Sectors/Track (512 bytes) |
260 (OD), 160 (ID) |
| Recording Method |
0,4,4 RLL |
| ECC |
144-bit Reed Solomon |
* Western Digital defines a megabyte (MB) as 1,000,000 bytes and a
gigabyte (GB) as 1,000,000,000 bytes
| Performance
Specifications |
Data Transfer Rate
- Media to Buffer
- Buffer to Host
- Sustained Audio/Video |
20 MB/s max
40 MB/s max
8.1 MB/s max |
Average Seek
- Read
- Write |
7.9 ms
9.0 ms |
Track to Track Seek
- Read
- Write |
0.8 ms
0.8 ms |
Full Stroke Seek
- Read
- Write |
17 ms
18 ms |
| Average Latency |
4.17 ms (nominal) |
| Rotational Speed |
7200 RPM (nominal) |
| Buffer Size |
512 KB (1MB optional) |
| Error Rate (Non-Recoverable) |
<1 in 1014 bits read |
| Spindle Start Time |
<30s to ready |
| Spindle Stop Time |
<20s |
| Contact Start/Stop Cycles (CSS) |
20,000 |
| Physical Dimensions |
| Height |
English:
1.0 inch (±0.02 inch)
Metric:
25.4 mm (±0.51 mm) |
| Length |
English:
5.75 inches (±0.02 inch)
Metric:
146.05 mm (±0.51 mm) |
| Width |
English:
4.00 inches (±0.01 inch)
Metric:
101.6 mm (±0.25 mm) |
| Weight |
English:
1.3 pounds (±0.13 pounds)
Metric:
0.59 kg (±0.06 kg) |
| Electrical
Specifications |
| Current Requirements and Power
Dissipation |
| Operating Mode |
Current Population
Mean + 4 Sigma |
Current Population
Mean |
Power Pop
Mean + 4
Sigma |
Power
Population
Mean |
| |
12 VDC |
5 VDC |
12 VDC |
5 VDC |
|
|
Spinup |
2.0 A |
0.74 A |
Peak DC
1.65 A |
0.71 A |
|
|
| Seek 50 ops/s |
0.78 A |
0.87 A |
0.68 A |
0.77 A |
13.7 W |
12.2 W |
| Idle |
0.54 A |
0.85 A |
0.47 A |
0.75 A |
10.7 W |
9.4 W |
| Read/Write |
0.78 A |
0.89 A |
0.68 A |
0.79 A |
13.8 W |
12.1 W |
| Input Voltage Requirements |
| +5.0V (±5%) and 12.0V (±10%) |
| Ripple |
| |
+12 VDC |
+5 VDC |
| Maximum |
Start: 400 mV (peak to peak)
Run: 150 mV (peak to peak) |
100 mV (peak to peak)
|
| Frequency |
60 Hz - 20 MHz |
60 Hz - 20 MHz |
| Environmental
Specifications* |
| Shock: |
Operating
10 G (2 shocks per second maximum)
Non-operating
70 G (3 shocks per axis maximum)
Non-operating Rotational Shock
10,000 rad/s2 |
| Vibration |
Operating
10-300 Hz, 1.0 G - 0.25 oct/min
Non-operating
5-20 Hz, 0.098 inch (peak to peak) - 1.0 oct/min
20-400 Hz, 2.0G (0 to peak) |
| Operating Temperature and Humidity |
Temperature
5ºC to 55ºC (41ºF to 131ºF)
Humidity
10-90% RH non-condensing
33°C (maximum wet bulb)
Thermal Gradient
10°C/hour (maximum) |
| Non-Operating Temperature and Humidity |
Temperature
-40ºC to 60ºC (-40ºF to 140ºF)
Humidity
5-95% RH non-condensing
33°C (maximum wet bulb)
Thermal Gradient
20°C/hour (maximum) |
| Altitude |
Operating
-1,000 feet to 10,000 feet (-300 M to 3,000 M)
Non-Operating
-1,000 feet to 40,000 feet (-300 M to 12,000 M) |
| Acoustics |
Idle Mode**
4.0 A-weighted bels (typical)
4.3 A-weighted bels (maximum)
Seek Mode
5.3 A-weighted bels (typical)
5.5 A-weighted bels (maximum) |
| Reliability |
MTBF
1,000,000 Power On Hours
Service Life
5 years |
* No non-recoverable errors during operating tests or after non-operating
tests.
** Sound power level.
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