How to recover system's data ?

Sometimes data present in the computer gets encrypted or hidden due to reasons like virus attack which can only be recovered by some computer forensic experts.

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[*]Preview and restore lost hard drive data and files.

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A wide variety of failures can cause physical damage to storage media, which may result from human errors and natural disasters.

CD-ROMs can have their metallic substrate or dye layer scratched off; hard disks can suffer from a multitude of mechanical failures, such as head crashes and failed motors; tapes can simply break.

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[*]Download and Install Disk Drill for Windows or Mac OS X.

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[*]Launch Disk Drill recovery software, select the crashed hard disk and click “Scan” button.

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Physical damage to a hard drive, even in cases where a head crash has occurred, does not necessarily mean there will be permanent loss of data.

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[*]Click “Recovery” button to recover your lost data.

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The techniques employed by many professional data recovery companies can typically salvage most, if not all, of the data that had been lost when the failure occurred.

Of course there are exceptions to this, such as cases where severe damage to the hard drive platters may have occurred.

However, if the hard drive can be repaired and a full image or clone created, then the logical file structure can be rebuilt in most instances.

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[*]Select the disk or card containing your deleted files and allow the tool to scan for missing files.

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[*]Select the files to recover.

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Most physical damage cannot be repaired by end users.

Most physical damage cannot be repaired by end users.

For example, opening a hard disk drive in a normal environment can allow airborne dust to settle on the platter and become caught between the platter and the read/write head.

During normal operation, read/write heads float 3 to 6 nanometers above the platter surface, and the average dust particles found in a normal environment are typically around 30,000 nanometers in diameter.[1]

When these dust particles get caught between the read/write heads and the platter, they can cause new head crashes that further damage the platter and thus compromise the recovery process

Furthermore, end users generally do not have the hardware or technical expertise required to make these repairs. Consequently, data recovery companies are often employed to salvage important data with the more reputable ones using class 100 dust- and static-free cleanrooms.[2]

Furthermore, end users generally do not have the hardware or technical expertise required to make these repairs. Consequently, data recovery companies are often employed to salvage important data with the more reputable ones using class 100 dust- and static-free cleanrooms.[2]

Recovering data from physically damaged hardware can involve multiple techniques