Data recovery basically means that someone has to try to salvage inaccessible data from a corrupted or damaged storage site. Hard drives, Solid State disks and even SD flash cards sometimes crash, and it’s always at the time when we need it to work to most so what do you do?
There are some steps you can take before you go out and hire a recovery expert to try and salvage your data which sometimes they are successful and sometimes they aren’t at salvaging files from storage media like hard disk drives, solid state drives, USB flash drives, CD’s, DVD’s, and magnetic tapes.
Data recovery can be needed for various things, the most critical is application data the operating system and applications can be re-installed but many times the application data can not be unless it has been backed up. There are many reasons for disk or storage media failure. Most consumer devices have less than a 100% duty cycle (More like 50%) meaning that they aren’t designed for continuous use. Consumer devices also usually have less stringent manufacturing tolerances and those for commercial use. Storage media is rated by mean time between failure (MTBF) but the failure can also be caused by physical damaged such as dropping the media or electro-static discharge (ESD) caused my touching the device without using an ESD wrist strap. Viruses, Mal-Ware, Root-Kits and other software bugs are another cause and a major on for the need to back up your data frequently and use a good anti-virus software.
If you have the most common type of data recovery it will be because of an operating system failure and in that case the technician will try to get your files on to an other device. If you have a drive level failure and/or a compromised file system or hard drive disk failure the data may not be as easy to recover and read. In this case the technician would try to repair the file system itself using commands such as fixmbr, chkdsk, systemfile checker, etc for windows and other commands for UNIX or Linux. If the hard drive itself has failed then there is a specialized disk imagining procedure that can be undertaken to try to recover every readable bit of the data that can be reclaimed. Then the files can possibly be reconstructed.
Usually if your computer crashes and you need a data recovery expert you will take the computer to them, but other times they have to do their work remotely either because the system is just too big to take in or just too far away for it to be possible. This of course requires a lot more skill and expertise in the field.
If your hard drive has failed, then there are four phases of data recovery. Repair the hard disk drive, image the drive to a new drive, logical recovery of files and repair retrieved files.
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