Western Digital AC2120 HARD DISK DRIVE REPAIR, Western Digital AC2120 HARD DISK DRIVE SPECIFICATIONS,
Western Digital AC2120 hard disk drive sales, Western Digital AC2120 hard disk drive repair, Western Digital AC2120 hard disk drive specifications, 
Western Digital AC2120 Hard Disk Drive Repair, Western Digital AC2120 Hard Disk Drive Specifications, Western Digital AC2120 Western Digital AC2120
Specifications



western digital ac2120 picture.
western digital ac2120 picture.
western digital ac2120 picture.

Western Digital AC2120 Specifications
Model Capacity Size Height Bus Type Int.Type
AC2120 Caviar 2 119MB 3.5" SL IDE AT

Specifications for the WD Caviar AC2120

Recommended Setup Parameters
Cylinders 872
Heads 8
Sectors/Track 35
Landing Zone 872
WPC 872
Jumper Setting Information Six Pin Drive
10 and 6 Pin Jumper Settings
Physical Specifications
Formatted Capacity* 125 MB
Interface 40-pin EIDE
Actuator Type Rotary Voice Coil
Number of Platters 2
Data Surfaces 4
Number of Heads 4
Bytes Per Sector 512
User Sectors Per Drive 244,182
Servo Type Embedded
Recording Method 2,7 RLL
ECC 56-bit
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) 15 ms
Track to Track Seek 6.0 ms
Full Stroke Seek

28 ms

Average Latency 8.34 ms
Rotational Speed 3605 RPM
Transfer Rate (Buffer to Host) 6.0 Mbits/second
Interleave 1:1
Buffer Size

32 KB

Error Rate (Non-Recoverable) <1 in 1012 bits read
Spindle Start Time
- From Power-on to Drive Ready*
   
6s typical
Contact Start/Stop Cycles (CSS) 10,000 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 (±0.51 mm)

Length English:
5.75 inches (±0.02 inch)

Metric:
146.05 mm (±0.51 mm)

Width English:
4.00 inches (±0.02 inch)

Metric:
101.6 mm (±0.51 mm)

Weight (min) English:
1.12 pounds

Metric:
.508 kg

Electrical Specifications
Current Requirements and Power Dissipation
Operating Mode Power, Typical*
Spinup 8.70 W
Read/Write 4.38 W
Power Management Commands
Operating Mode Power, Typical*
Idle 2.86 W

Input Voltage Requirements

+5.0V (±5%) and 12.0V (±5%)

* All values are typical (25°C, 5.0V, and 12V input) except where specified as maximum.

Environmental Specifications
Shock:* Operating
10 G

Non-operating
75 G
Vibration Operating
5-17 Hz, 0.034 inches (double amplitude)
17-400 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)

Operating Temperature and Humidity Temperature
5º C to 50º C (41ºF to 122ºF)

Humidity
8-80% RH non-condensing

Thermal Gradient
10°C/hour (maximum)
Non-Operating Temperature and Humidity

Temperature
-40º C to 60º C (-40ºF to 140ºF)

Humidity
5-95% RH non-condensing

Thermal Gradient
20°C/hour (maximum)

Acoustics Idle Mode**
40 dBA (typical)
Reliability

MTBF
100,000 Hours

Warranty Period
Warranty Status

* Half sine wave, measured without shock isolation and without non-recoverable errors.

** No audible pure tones.


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