The Ins and Outs of Hard Drive Failure

Hard drives can experience many different kinds of problems. The majority of issues fall into three basic categories: logical failures, mechanical failures and firmware failures. If you want to recover your data after a fault, you must understand what kind of failure you’ve experienced so that you can apply the correct solution.



Logical Failure

Logical Data Recovery


Understanding Hard Drive Logical Failures – Data Recovery

Hard drives store files using a number of different schemes that help them optimize space usage, deal with data errors and solve other common problems. When your computer encounters a drive whose storage doesn’t fit the expected patterns, it usually won’t recognize it as a readable device because it doesn’t understand what it contains.


How Do I Know if My Hard Drive is Experiencing a Logical Failure?

Different things can induce logical failures. For instance, a hard drive’s Master Boot Record, or MBR, may have been corrupted so that the computer can’t retrieve boot instructions. Similarly, viruses or malware can also cause operating system, or OS, errors by preventing the retrieval of necessary files. In some cases, incorrectly shutting down, deleting, reformatting or partitioning files may cause corruption.

Each of these problems has different symptoms. With MBR and OS file errors, your computer may not boot at all if the primary drive is faulty, or it may present errors. In other cases, it will start up, but it might be slow, or you’ll discover that data on a secondary drive mysteriously goes missing. In any case, you’re likely to require a recovery or retrieval service such as a deep scan to rebuild missing information.

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Mechanical Failure

Mechanical Data Recovery


Understanding Hard Drive Mechanical Failures – Data Recovery 

Your hard drives are complex devices that include numerous components. If any of these important parts become damaged due to shock or control errors, they may lose the ability to do their jobs. To correct mechanical problems, most users have to send their drives off to clean-room facilities so that retrieval experts can open them, temporarily replace their parts and transfer the data they contain to fresh, functional drives.


How Do I Know if My Hard Drive is Experiencing a Mechanical Failure?

Common symptoms of mechanical disk failures include:

  • Drive motors not spinning or having trouble reaching appropriate speeds,
  • Drives making strange buzzing sounds during startup or “tick tack”-like clicking sounds during operation,
  • Disks freezing mid-operation due to bad sectors,
  • Disks failing to respond to system commands,
  • Disks not being detected by the OS when they seem to be properly connected, and
  • Disks being recognized by your OS but not being read normally due to weak read-write heads.

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Firmware Failure
Firmware Data Recovery

Understanding Hard Drive Firmware Failures – Data Recovery

Firmware failure can be similar to logical failure, or can resemble mechanical failure. Your computer may recognize the drive as a drive, but due to problems with its firmware (controller) of the device, it won’t be able to access the data, or the computer may not recognize the drive at all. Only around 7 percent of data retrieval jobs necessitate firmware recovery, as it’s the least common failure mode.


How Do I Know If My Hard Drive is Experiencing a Firmware Failure?

Firmware tells a hard drive how to start up and function normally. It lets the control circuit know when to turn on the motor, move the read-write heads to access or write data and perform other critical tasks. As a result, the symptoms of a failure may vary widely and produce a range of behaviors that are difficult to diagnose without having a professional evaluate the drive.


Where Is the Firmware Located?

The Firmware is a piece of information stored on the hard drive when it was manufactured. Hard drives store firmware in different places. Part I is stored on the printed circuit board, or PCB, behind the drive, while Part II is written on the drive’s platters in specialized service tracks. Since firmware is data instead of a physical component, it’s not something you can simply see and replace. Recovery specialists often have to reconstruct devices using parts from similar drives, which requires proper clean room facilities and experience.

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