Logical (Software) Failure Leading to Data Loss

This complexity of the internal configuration of a hard drive makes it vulnerable to many types of defects and faults. These failures may either occur due to some mechanical defect or may be caused by mishandling or software errors.

No matter the reason behind a hard drive failure, the end result is always the same i.e. the data becomes inaccessible or gets corrupted. The biggest challenge in such a situation is to recover the lost data. Since the hard drive is the main storage device in all PCs and laptops, the price of the compromised data far exceeds the cost of the damaged drive.

Various Types of Hard Drive Failure

Hard drive failure can be caused due to many reasons and can be classified into some broad categories. The most common of hard drive failures is known as mechanical failure. It occurs owing to some damage to the internal mechanical components of a hard drive. Then we have the electronic failure which happens due to some problem with the controller board of a hard drive.

Firmware is the software code that is embedded in a hard drive. Any corruption of firmware can cause a hard drive failure. One of the most notorious types of hard drive failure is known as logical error or failure. Most of the times it happens because of some damage to the file system and it is basically a software problem. The irony is that logical failure is one of the easiest and yet sometimes the most difficult of problems to deal with.

Symptoms of Logical Failure

The most common symptom of a logical failure is that though the drive is recognized by the system BIOS, yet it fails to boot. Logical failure does not require any disassembling or mechanical repair of a hard drive. If dealt with meticulously, the data is often recoverable in most of the cases.

Causes of Logical (Software) Failure

The various possible reasons that can cause a logical failure are:

Computer Viruses

Various malware contacted during the network operations can cause damage to the data saved on a hard drive. Sometimes the data may get permanently irretrievable.

Improper Shutdown

If the proper shutdown procedures are not followed religiously before switching off a hard drive, a logical failure may occur.

Accidental Deletion

Important files or folders may accidentally be deleted by a user. In such a case, the deleted data continues to reside on a hard drive and is easily recoverable before it gets overwritten.

Reformatting of a Hard Drive

Once a hard drive is reformatted or repartitioned, all the data saved on it is lost.

DIY Data Recovery Software

Though DIY data recovery software and disk repair utilities have their advantages, yet they may often create problems that could make the compromised data permanently irretrievable.

Corrupt File System

File system may get corrupted owing to a number of software or hardware problems.

Cross Linked Files

Following an improper shutdown or crash, the important files may get cross linked. The cross linked files share the same coordinates on a hard drive and can cause serious problems.

Problems with Operating System

Operating system failure also known as system crash is one of the leading causes of logical failure.

Master Boot Record Failure

Master boot record residing on the first sector of a hard drive may get corrupted due to power surges or virus attacks.

Boot Sector Failure

In case of a boot sector failure, the system is unable to start itself.

File Fragmentation

A fragmented file gets broken up into various fragments which are spread across various clusters of the disk.

Precautions against Logical Failures

Safety precautions to guard against logical failures:

• Do backup your data on a regular basis. Mission critical data should have multiple backups with copies stored at safe offsite locations.


• Use some reputed and authentic antivirus software and run it on a regular basis to scan your hard disk. Take care that your antivirus software is upgraded on a regular basis and is provided with all the latest security patches.


• Defragment your hard drive regularly to guard against unhealthy fragmentation of your important files.


• Use proper USP devices and surge protectors while running your computers.


• Never try to recover the data on your own in case of severe logical failure.