Western Digital AC12500 hard disk drive sales, Western Digital AC12500 hard disk drive repair, Western Digital AC12500 hard disk drive specifications, 
Western Digital AC12500 Hard Disk Drive Repair, Western Digital AC12500 Hard Disk Drive Specifications, Western Digital AC12500 Western Digital AC12500

western digital ac12500 picture.
western digital ac12500 picture.
western digital ac12500 picture.

Western Digital AC12500 Specifications
Model Capacity Size Height Bus Type Int.Type
AC12500 2559MB 3.5" SL ATA3 Ultra

Specifications for the WD Caviar AC12500

Recommended Setup Parameters
Cylinders 4960
Heads 16
Sectors/Track 63
Landing Zone 4960
WPC 4960
Jumper Setting Information Ten Pin Drive
10 and 6 Pin Jumper Settings
Physical Specifications
Formatted Capacity* 2,559 MB
Interface 40-pin EIDE
Actuator Type Rotary Voice Coil
Number of Platters 1
Data Surfaces 2
Number of Heads 2
Bytes Per Sector 512
User Sectors Per Drive 4,999,680
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
Average Seek (Write) 11.5 ms
Track to Track Seek 2.0 ms
Full Stroke Seek 19 ms
Average Latency 5.5 ms
Rotational Speed 5400 RPM
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 DMA)
Transfer Rate (Buffer to Disk) 87.9 Mbits/s minimum
148 Mbits/s maximum
Interleave 1:1
Buffer Size 256 K DRAM
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
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)

25.4 mm (±0.51 mm)

Length English:
5.75 inches (±0.02 inch)

146.05 mm (±0.51 mm)

Width English:
4.00 inches (±0.02 inch)

101.6 mm (±0.51 mm)

Weight (min) English:
1.1 pounds (±0.11 pounds)

.500 kg (±0.050 kg)

Electrical Specifications
Current Requirements and Power Dissipation
Operating Mode Power, Typical*
Spinup 18 W
Read/Write/Idle 6.08 W
Power Management Commands
Operating Mode Power, Typical*
Standby 1.5 W
Sleep 1.0 W

Input Voltage Requirements

+5.0V (±5%) and 12.0V (±8%)

* 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

150 G
Vibration Operating
5-20 Hz, 0.037 inches (double amplitude)
20-300 Hz, 0.75 G (0 to peak)

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 55º C (41ºF to 131ºF)

5-85% RH non-condensing

Thermal Gradient
20°C/hour (maximum)
Non-Operating Temperature and Humidity

-40º C to 60º C (-40ºF to 140ºF)

5-95% RH non-condensing

Thermal Gradient
30°C/hour (maximum)

Acoustics Idle Mode**
37 dBA (typical)

400,000 Hours

Warranty Period
Warranty Status

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

** No audible pure tones.

All manufacturer's Names, Logos and trademarks are the properties of the respective manufacturer.

HOME Western Digital drives All Hard Drives

Check our Media Store for all your Floppy Disk and Tape Supplies.

Contact us

Copyright © 1997 - 2011 Erv Fleckstein ( M. Farris & Associates ). All Rights Reserved.