Data Recovery

Data recovery is the process of salvaging data from damaged, failed, corrupted, or inaccessible secondary storage media when it cannot be accessed normally. Often the data are being salvaged from storage media such as internal or external hard disk drives, solid-state drives (SSD), USB flash drive, storage tapes, CDs, DVDs, RAID, and other electronics. Recovery may be required due to physical damage to the storage device or logical damage to the file system that prevents it from being mounted by the host operating system.

The most common "data recovery" scenario involves an operating system (OS) failure (typically on a single-disk, single-partition, single-OS system), in which case the goal is simply to copy all wanted files to another disk. This can be easily accomplished with a Live CD, most of which provide a means to mount the system drive and backup disks or removable media, and to move the files from the system disk to the backup media with a file manager or optical disc authoring software. Such cases can often be mitigated by disk partitioning and consistently storing valuable data files (or copies of them) on a different partition from the replaceable OS system files.

Another scenario involves a disk-level failure, such as a compromised file system or disk partition, or a hard disk failure. In any of these cases, the data cannot be easily read. Depending on the situation, solutions involve repairing the file system, partition table or master boot record, or hard disk recovery techniques ranging from software-based recovery of corrupted data to hardware replacement on a physically damaged disk. If hard disk recovery is necessary, the disk itself has typically failed permanently, and the focus is rather on a one-time recovery, salvaging whatever data can be read.

In a third scenario, files have been "deleted" from a storage medium. Typically, the contents of deleted files are not removed immediately from the drive; instead, references to them in the directory structure are removed, and the space they occupy is made available for later overwriting. In the meantime, the original file contents remain, often in a number of disconnected fragments, and may be recoverable.

The term "data recovery" is also used in the context of forensic applications or espionage, where data which has been encrypted or hidden, rather than damaged, is recovered.

Read more about Data Recovery:  Physical Damage, Logical Damage, Remote Data Recovery

Other articles related to "data recovery, data, recovery":

Srm (Unix)
... However, data recovery techniques used by governments, such as intelligence agencies, remain a matter for deep speculation ... probably best to remain agnostic on the issue of potential data recovery by deep pocket enterprises, especially since the well-studied Gutmann algorithm ... to maintain exact registration over a physical bit of recorded data that allows both the possibility of data recovery, and Gutmann's ingenious reply to this weakness ...
Kroll Inc. - Range of Operations - Ontrack and Electronic Data Recovery
... the acquisition of Ibas Holdings ASA, a leading Norwegian-based provider of data recovery, data erasure and computer forensics services ...
Remote Data Recovery
... It is not always necessary for experts to have physical access to the damaged drive where data can be recovered by software techniques, they can often be used remotely, with an expert using a computer at another ... Remote recovery requires a stable connection of adequate bandwidth ...
Soundstream - The Technology - The Digital Tape Recorder
... processor containing the analog to digital converters, tape-data recovery and clock generation circuits, and the digital to analog converters ... by interface electronics to the tape transport where each audio channel's data were written to two separate tape tracks ... and monitoring from tape, the redundant tracks of recorded data from the transport were sent to data recovery circuitry ...
Data Salvaging
... Data recovery is the process of salvaging data from damaged, failed, corrupted, or inaccessible secondary storage media when it cannot be accessed normally ... Often the data are being salvaged from storage media such as internal or external hard disk drives, solid-state drives (SSD), USB flash drive, storage tapes ... Recovery may be required due to physical damage to the storage device or logical damage to the file system that prevents it from being mounted by the host operating system ...

Famous quotes containing the words recovery and/or data:

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