WD7502AALS Western Digital 3.5″ hard drive with a storage capacity of 750 GB and featuring a SATA interface. WD7502AALS Western Digital 3.5″ 750 GB Serial ATA-300 Caviar Black 7200 RPM 32 MB Cache Hard Drive.

All information about the Western Digital WD7502AALS hard disk drive: technical parameters, failure symptoms, frequently asked questions, reviews, HDD repair and data recovery.

Western Digital WD7502AALS Technical Details:

Manufacturer:
Western Digital Corporation
Hard Disk Model:
WDC WD7502AALS
Disk Family:
Caviar Black (High-Performance series)
Form Factor:
3.5″
Capacity:
750 GB (750,000,000,000 bytes)
Formatted Capacity:
Approximately 698.6 GB
Number Of Disks:
3
Number Of Heads:
6 (Single-surface skipped variants exist as 3-disk/5-head depending on component tracking)
Rotational Speed:
7200 RPM
Average Seek Time:
8.9 ms (read, typical)
Disk Interface:
Serial ATA-300 (SATA 3 Gb/s)
Buffer Size / Cache:
32768 KB (32 MB)
External Transfer Rate:
300 MB/s
Internal Transfer Rate:
Up to 145 MB/s
Advanced Format:
512n (native 512-byte sectors, traditional standard)

Note: The Western Digital WD7502AALS is a cornerstone member of the legacy dual-processor **Caviar Black high-performance family**, released around 2008-2009. The “AALS” suffix indicates a desktop-performance focus matching a **32 MB cache buffer** paired with a native **SATA 3 Gb/s link**. Built upon WD’s robust multi-platter configuration, this 750 GB workhorse leverages a high-grade performance control board integrated with StableTrac technology to anchor the motor shaft at both ends, drastically lessening system vibration. Adhering to the traditional **512n sector standard**, it guarantees 100% historical compatibility with legacy operating systems and RAID arrays without requiring partition alignment tools.


Western Digital WD7502AALS Hard Drives:

  • WD7502AALS – 750 GB SATA 3.5″ Desktop Hard Drive, Caviar Black series

Western Digital WD7502AALS 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 WD7502AALS Data Recovery & HDD Repair:

When it comes to data recovery one of the most common problems Western Digital WD7502AALS 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.

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