WD400JS Western Digital 3.5″ hard drive with a storage capacity of 40 GB and featuring a SATA interface. WD400JS WD 3.5″ 40 GB Serial-ATA/300 Caviar SE 7200 RPM Hard Drive.
All information about the Western Digital WD400JS hard disk drive: technical parameters, failure symptoms, free asked questions, reviews, HDD repair and data recovery.
Western Digital WD400JS Technical Details:
- Hard Disk Model: WDC WD400JS-
- Disk Family: Caviar SE
- Form Factor: 3.5″
- Capacity: 40 GB (40 x 1 000 000 000 bytes)
- Rotational Speed: 7200 RPM
- Rotation Time: 8.33 ms
- Average Rotational Latency: 4.17 ms
- Disk Interface: Serial-ATA/300
- Buffer-Host Max. Rate: 300 MB/seconds
- Buffer Size: 8192 KB
- Drive Ready Time (typical): 9 seconds
- Average Seek Time: 8.9 ms
- Track To Track Seek Time: 2 ms
- Full Stroke Seek Time: 21 ms
- Width: 101.6 mm (3.98 inch)
- Depth: 147 mm (5.79 inch)
- Height: 25.4 mm (0.98 inch)
- Manufacturer: Western Digital Corporation
Western Digital WD400JS Hard Drives:
- WD400JS WD 3.5″ 40 GB Serial-ATA/300 Caviar SE 7200 RPM Hard Drive.
Western Digital WD400JS 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 WD400JS Data Recovery & HDD Repair:
When it comes to data recovery one of the most common problems Western Digital WD400JS 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 etc.