WD400AB Western Digital 3.5″ hard drive with a storage capacity of 40 GB and featuring a IDE interface. WD400AB WD 3.5″ 40 GB Ultra-ATA/100 Caviar 5400 RPM Hard Drive.
All information about the Western Digital WD400AB hard disk drive: technical parameters, failure symptoms, free asked questions, reviews, HDD repair and data recovery.
Western Digital WD400AB Technical Details:
- Hard Disk Model: WDC WD400AB
- Disk Family: Caviar
- Form Factor: 3.5″
- Capacity: 40 GB (40 x 1 000 000 000 bytes)
- Rotational Speed: 5400 RPM
- Rotation Time: 11.11 ms
- Average Rotational Latency: 5.56 ms
- Disk Interface: Ultra-ATA/100
- Buffer-Host Max. Rate: 100 MB/seconds
- Buffer Size: 2048 KB
- Drive Ready Time (typical): 6 seconds
- Average Seek Time: 10.9 ms
- Track To Track Seek Time: 2.0 ms
- Full Stroke Seek Time: 21.0 ms
- Width: 101.6 mm (3.98 inch)
- Depth: 147 mm (5.79 inch)
- Height: 26.1 mm (1.02 inch)
- Weight: 600 grams (1.32 pounds)
- Acoustic (Idle): 3.4 Bel
- Acoustic (Min performance and volume): 3.6 Bel
- Acoustic (Max performance and volume): 3.6 Bel
- Required Power For Spinup: 2200 mA
- Power Required (Seek): 8.0 W
- Manufacturer: Western Digital Corporation
Western Digital WD400AB Hard Drives:

- WD400AB WD 3.5″ 40 GB Ultra-ATA/100 Caviar 5400 RPM Hard Drive.
Western Digital WD400AB Failure Symptoms:
- Electrical Failure Symptoms:
Drive is powered, but shows no sign of function;
Disk knocking as the motor fails to spin;
Clicking sound as the heads search or initialize; - Mechanical Failure Symptoms:
Clicking, grinding sounds;
Completely quiet due to ” motor freeze”;
“music” tone as the disk is powered up; - Logical Failure Examples:
Accidental deletion, accidental format, file corruption, software bugs, file system corruption, viruses and malware, and many, many more. - Firmware Failure Symptoms:
drive powers up, but is not recognised by the computer;
Drive powers up, but is recognised wrongly, sometimes with nonsensical characters;
Drive freezes during booting up; - Bad Platter Area Symptoms:
Hard disk still accessible but appear to “hang” or “sluggish”;
Constant Cyclic Redundancy (CRC) errors;
Unable to access folders or files which could be seen; - Complex Failure Model
Western Digital WD400AB Data Recovery & HDD Repair:
When it comes to data recovery one of the most common problems Western Digital WD400AB hard drive experience is a burned circuit board (PCB). Therefore, if you need to replace the PCB, be sure to match the “PCB Number” of the current board, such as 2060-001113-001, 2060-001092-006, 2060-001062-004, 2060-701335-005, 2060-001076-002, etc.