In this article we will explore the four main types of hard disk failure: firmware corruption, electronic failure, mechanical failure and logical failure. These can occur either on their own or in combination. It is also worth noting that all hard disks have a life span and will eventually develop bad sectors at some stage. 1. Firmware corruption Most people have heard of software (eg. computer programs) and hardware (eg. the hard drive) but not firmware. Firmware is actually software code that is embedded in the hardware and it serves to control the disk. This code can become corrupted such that the operating system (eg. Windows) can no longer communicate with the disk. As the stored data itself is usually unaffected, it is nearly always recoverable. When a disk has a firmware error, it will usually spin up as normal but be recognised differently to how it usually is by the BIOS of the host computer. It is nearly always possible to successfully recover the data from the drive but to do so requires the drive’s firmware to be reprogrammed by a data recovery company, who will then be able to recover the data. 2. Electronic failure This refers to
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