Smart Ideas: Recoveries Revisited

Smart Ideas: Recoveries Revisited

Facts about Data Recovery

When data, which are described as inaccessible, lost, corrupted, damaged, formatted, cannot be retrieved from secondary storage or from removable media or files, the process of retrieving these data is known as data recovery. Recovery process is performed because of the physical damage condition of the storage devices or of the file system, such that there is difficulty mounting the devices by the operating system in the computer.

An operating system failure, malfunction of a storage device, logical failure of storage devices, accidental damage or deletion are common examples of scenario where data recovery is applied, in which case it is simply to copy all important files from the damaged media to another new drive. To solve this scenario using the procedure of data recovery, a live CD is used in which this device has provided the means to mount the system drive and backup drives or even removable media and also provided a procedure to move the files from the system drive to the backup media using a file manager or optical disc authoring software.

A drive-level failure, such as a compromised file system or drive partition, hard disk failure, or data is not easily read from the media devices are considered second types of scenario when data recovery is needed. For this scenario, there are many procedures where data recovery process can be applied and this involves: repairing the logical file system, partition table or master boot record or updating the firmware or updating drive recovery techniques ranging from software-based recovery of corrupted data, hardware-based and software-based recovery of damaged service areas to hardware replacement on a physically drive which involves changing the parts of the damaged drive to make the data in a readable form and can be copied to a new drive.
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Still another scenario is when , the files have been accidentally deleted from a storage medium by the users. To apply data recovery, procedural steps involve, as follows: contents of the deleted files are not removed immediately from the physical drive, because, technically, the deleted data still exists on the physical drive; therefore, references to them in the directory structure are removed and thereafter, the space which the deleted data has occupied can be made available later for data overwriting.
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For a physically damaged hardware, data recovery may be applied by any of these procedures: repair by replacing parts in the hard disk or a specialized disk-imaging procedure may be used to recover every readable data from the surface and once it is recovered and saved on a reliable medium, the image can be safely analyzed for logical damage and allow the original file system to be reconstructed.

There are basically four phases when it comes to a successful data recovery and these are: Phase 1 – repairing the hard disk drive, Phase 2 – imaging the drive to a new drive or to a disk image file, Phase 3 – logical recovering of the files, partition, MBR, and file system structures, Phase 4 – repairing damaged files that were retrieved.

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