WD400JB Western Digital 3.5″ hard drive with a storage capacity of 40GB and featuring a IDE interface. WD400JB Western Digital Caviar 40GB 7200RPM EIDE 8MB Cache Dma/ata100 (ultra) 40-Pin 3.5-inch Low Profile (1.0 inch) Hard Drive.
All information about the Western Digital WD400JB hard disk drive: technical parameters, failure symptoms, free asked questions, reviews, HDD repair and data recovery.
Western Digital WD400JB Technical Details:
- Hard Disk Model: WDC WD400JB
- Disk Family: Caviar SE
- Form Factor: 3.5″
- Capacity: 40 GB (40 x 1 000 000 000 bytes)
- Number Of Disks: 1
- Number Of Heads: 1
- Rotational Speed: 7200 RPM
- Rotation Time: 8.33 ms
- Average Rotational Latency: 4.17 ms
- Disk Interface: Ultra-ATA/100
- Buffer-Host Max. Rate: 100 MB/seconds
- Buffer Size: 8192 KB
- Drive Ready Time (typical): 7 seconds
- Average Seek Time: 8.9 ms
- Track To Track Seek Time: 2.0 ms
- Full Stroke Seek Time: 21.0 ms
- Width: 101.6 mm (4.00 inch)
- Depth: 147 mm (5.79 inch)
- Height: 26.1 mm (1.03 inch)
- Weight: 600 grams (1.32 pounds)
- Acoustic (Idle): 3.5 Bel
- Acoustic (Min performance and volume): 3.7 Bel
- Acoustic (Max performance and volume): 3.9 Bel
- Required Power For Spinup: 1005 mA
- Power Required (Seek): 7.0 W
- Power Required (Idle): 7.0 W
- Power Required (Standby): 1.0 W
- Manufacturer: Western Digital Corporation
Western Digital WD400JB Hard Drives:
- Western Digital 40GB 7200RPM WD400JB 3.5" HDD
- WD400JB-00JJC0, DCM DSBANTJCA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSBHYTJCA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSBHYTJAA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DBCHNTJEAN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSCHYTJEHN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM ESBAYTJAA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSCHYTJEAN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HBBACTJEAN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HBCHYTJEHN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSCACTJAA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSBHNTJAH, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSCANTJAAN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSBAYTJEHN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSBANTJCH, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSBHNTJAHN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSCAYTJEHN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSBAYTJCA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00ENA0, DCM DSBANV2AH, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSCAYTJEAN, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSBHNTJAA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSBANTJAH, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM DSCHNTJAH, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM ESBACTJAA, Western Digital 40GB IDE 3.5″ Hard Drive
- WD400JB-00JJC0, DCM HSBHYTJAA, Western Digital 40GB IDE 3.5″ Hard Drive
Western Digital WD400JB 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 WD400JB Data Recovery & HDD Repair:
When it comes to data recovery one of the most common problems Western Digital WD400JB Hard Disk Drive experience is burnt circuit board(PCB). So if you will need to match a replacement PCB, it is important that you note the “Board Number” of your current circuit board in addition to the hard drive’s “Model Number“.
Multiple PCB Number revisions:
2060-701292-002, 2060-70292-000, 2060-001209-004, 2060-701292-000, 2060-001189-003, 2060-001175-000, etc.
Multiple Model Number revisions:
WD400JB-00FMA0, WD400JB-00JJC0, WD400JB-00ETA0, WD400JB-00ENA0, etc.