Data Recovery

The process of salvaging data from corrupt hard drives or other storage media is known as data recovery. This recovery may be needed due to physical damage or damage to the file system (which can happen with viruses), which successfully prevent the hard drive or storage media from being mounted by the host operating system. Hard drive manufacturers seldom tell their clients how often hard drives can stop working and become corrupted, even with normal use.

Physical damage to hard drives and storage media, such as the metallic substrate of a CD-ROM scratching off, causes data loss and results in the damaging of the logical structure of the file system. This damage has to be fixed before a single file can be salvaged from the damaged media. End Users rarely have the means or the experience to repair physical damage, and so costly data recovery companies are employed to salvage media. These firms use "Class 100" / ISO-5 clean room facilities to protect the media while the repairs are in progress, which prevents dust from settling on the exposed hard drive, which can damage it further and compromise the recovery process. An example of physical recovery is to replace the damaged circuit board with a healthy one, or simply swapping parts of a hard drive with the healthy parts of a fully functioning hard drive. The creation of virtual disks (also known as 'disk imaging') is also helpful in the reconstruction of the lost images, as these images can then be converted into a usable form. This method of hard drive repair can also be used to fix logical damage.

Power outages, viruses, or system crashes can cause Logical damage to hard drives or other storage media, and these can render it useless. These crashes can be prevented by using reliable file systems, such as ext3, and regularly defragmenting the drive. There are two main methods of recovering data from a hard drive that has been logically damaged. One of these methods is to scan the data on the disk and to make sure that it is consistent with its specification. This method is known as Consistency Checking. It checks the directories and file entries in the hard drive and whether they point to the correct places. In the event that they do not, an error message flashes, and the problem can be resolved. Both 'chkdsk' and 'fsck' work in this fashion. Another method of logical data recovery is to analyse the data, provide details of the logical errors, and rebuild the file system. This method of data recovery is known as Data Carving.

There are many different ways to perform data recovery on your devices and finding the best, and most cost effective solution is always a difficult process. One of your best options is to search for the type of storage device online and see if there are any preferred services to recover data for that particular device.