by jon crain
In last month, my friend nick got in trouble when he founds his hard disk fails to read any data from disk. Absolutely, it was a problem of data corruption in his hard drive. I had suggested him to go computer vendor where he had buy that computer & repair the hard drive.

Then, there was only one way to recover its data from hard disk. And that is what data recovery software, which is the most integral application in such critical situation.

Data recovery essentially means the procedure of acquire back usable data from the damaged, corrupt media or storage device. The loss of important data can cause fall down of businesses, leaving you and your company in the most vice situation to face.

Recovering data from physically damaged hardware can involve various techniques. Some damage can be repair by replacing part in the hard disk. This alone may make the disk usable, but there may still be logical damage.

A specialized disk imaging procedure is used to recover every readable bit from the surface. Once this image is acquired and saved on a reliable medium, the image can be safely analyzed for logical damage and will possibly allow for much of the original file system to be reconstructed.

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 formats such as hard disk drives, 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.

Although there is some confusion as to the term, data recovery can also be the process of retrieving and securing deleted information from a storage media for forensic purposes or spying.

Two general techniques used to recover data from logical damage are consistency checking and data carving. While most logical damage can be either repaired or worked around using these two techniques, data recovery software can never guarantee that no data loss will occur.

For instance, in the FAT file system, when two files claim to share the same allocation unit (cross linked), data loss for one of the files is essentially guaranteed.

Nowadays, data recovery becoming an integral part of large enterprises, small businesses and also has various important applications in information technology industry to build up disaster management system for their domain computers.

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by Bill Wei
Rapid development of IT industry leads to a new emerging mode: data recovery. Data recovery is actually just around us for decades, unnoticed. Nowadays, it emerges a new branch of IT industry. Data Recovery includes Data Recovery software and Data Recovery service.

Connotation of Data:

With rapid development of global informationized, data becomes one of very important assets for organizations. Storage, safety and integrity of data is not just technology issues, but demonstration of ability to survival and competitiveness. They are same for governments, organizations, or even individuals.

Data hereinafter refers to information stored in computer and removable media. Firstly, Data is general concept, not only includes PC files, or various data stored in computer, for instance, multimedia files, like graphic, images, and audio, softwares and documents, database, or just about anything that can be taken by digital cameras, digital recorders, but also the hardware managed or stored those information. Although “data” and “information” appear in many documents, not any definition of “data” and “information” is public accepted. We simply understand them as various files in hard drives and storage media.

What is Data Recovery?

Simply said, Data Recovery is to successfully recover formatted or corrupted data due to virus attacks and accidents. It not only recovers the data from the files, phsically damaged drive, operating systems, but also digital removable memory sticks.

The range of Data Recovery includes: Soft troubles and Hard troubles.

Soft troubles:

(1) recover system files that have been damaged due to accidental partition, accidental or malicious formats, accidental restoring system, deletions, accidental copy — partitions, Main boot record loss, boot loss, virus attacks, hackers attacks, devil programs, disk array server raid loss, power failure, memory overflow, software conflicts, power-off forcibly, and crash.

(2) recover common files that have been destroyed, such as: Office files, database files of Microsoft SQL, Oracle, Sybase, Fox base/pro, Zip, MS Outlook, Exchange Email and multimedia files.

(3) recover passwords of operating system (example: Windows 2000/Xp) and files of zip, rar, Word, Excel, Access and PDF.

Hard troubles:

1. Symptoms of hard troubles:

Do not recognize CMOS

“Ka Ka” sound of magnetic head collision

Motor doesn’t work, and no sound after power on.

Read/write errors due to magnetic head dislocation

2. Sort of hard disk or hardware troubles:

Disc body have been corrupted due to magnetic head burnout, aging, chip corruption, disc corruption magnetic head shift, disc scratch, magnetic group deformation, servo information loss.

PCB troubles due to PCB corruption, chipset burnout, disconnection or dis-pins.

What shall we do when data loss?

We suggest you to use data recovery software once there is data loss. It is possible to recover the lost data.

If the files of your CD/DVD are corrupted, CD/DVD Data Recovery is an easy-to-use tool to recover them, it is effective for corrupted digital multimedia files, audio, video, image files, MPEG, AVI, RM, MP3, JPEG etc, and for damaged document and text files.

Notes:
1. Do not store files or data into computer when there is accidental or malicious formats or deletions. Otherwise, more data will loss, and can not be recovered, even if the professional engineers.
2. Do not power it on when removable drives or hard drives corruption. Because magnetic head of hard disc is usually damaged.
3. Do not initialized or Rebuild when Raid disc array server is wrong.
4. Read, not write is general principal.

Please quote the original source in the form of including a link back to www.008soft.com/data-recovery.htm if you are going to use this article. Copyright © 2003-2007, www.008soft.com All Rights Reserved.

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by James Walsh
Data loss incidents are hardly an event to try your own hit-and-trial methods. Any wrong action on your part can make your data even more vulnerable to permanent data loss. Due to this reason, there exists a specialised field of data recovery, which aims to provide a solution to our data loss woes.

Data recovery is the process of recovering lost files, deleted data, or damaged data from the damaged media. There are many software available in the market that can help you to retrieve your data. The data recovery software runs on a pre-programmed format and can be useful in recovering accidental file partition, or volume deletions, and virus attacks.

However, if the nature of the problem is severe, hiring the services of a data recovery specialist is your best bet. There are many data recovery companies that guarantee successful results and recover most of our data intact. A data recovery specialist will perform an extensive evaluation of your data loss incident, which is usually free of cost.

Most of the data recovery companies charge you only if they are able to recover your data successfully. In addition, a data recovery specialist will be able to give clarity on the likelihood of retrieving your files. A data recovery specialist is a highly qualified and experienced individual who will also be able to retrieve your data on a priority basis i.e. if you want to recover certain business-critical files immediately, a data recovery specialist will be able to prioritise the data recovery process in the specified manner.

Recovering your lost data is no child’s play. Data recovery entails use of highly specialised techniques and tools. Often, hardware repair requires more technical expertise than logical damage repairs. If the data loss is due to hardware damage, the hardware parts will need to be replaced or repaired, which requires technical expertise that is very precise in nature.

Data recovery engineers have to operate on microchips, hard disk platters, and other fragile components and have to be careful about not only solving the problem but also ensuring that the components are not damaged further because of any handling error.

Disk imaging is a popular technique used by the data recovery specialist. Disk imaging is a technique that extracts the raw image of the hard disk. This extracted image is used to reconstruct the data in a usable format after the damages have been repaired. Consistency checking is a data recovery technique that is used when the data needs to be recovered from logical damage. This approach uses the scan of the logical structure of the hard disk and checks that the files are consistent with their specification.

Zero-knowledge analysis is also helpful for recovering files from logical damage. This approach uses the hints from the undamaged file system to rebuild the file system from scratch. The zero-knowledge analysis involves scanning the hard drive and making a note of all file system boundaries and structures.

As we have observed, data recovery is a very specialised field. Since the data that any data recovery company handles is so valuable for the users, the data recovery company cannot afford to be negligent at their end. Due to this, the data storage devices have to be handled with extreme caution.

A clean room environment enables the data recovery company to handle the extremely delicate hard disks in the most appropriate manner. A clean room environment is free of pollutants that come from air, water, human, and environmental pollution. Any form of contamination can contaminate the hard disk platters, which can make the data loss incident a permanent one.

Data recovery can be an expensive proposition. When people lose their valuable data, most of them end up spending large amounts on data recovery specialist’s fee. This is due to the fact that data recovery is an expensive process and not many companies can boast of actual successful data recovery. Therefore, companies that do guarantee successful data recovery have to ensure that they have the best equipment, engineers, and tools to help them achieve their success target. Clean room environments are expensive to set up and maintain. In addition, the highly skilled software and hardware engineers have to be compensated in accordance with their skills and experience. There are times when the data recovery companies have to use proprietary tools. These tools are very expensive. Therefore, all these costs are reflected in the data recovery company’s cost of service.

James Walsh is a freelance writer and copy editor. If you are concerned about data loss and would like more information on Data Recovery see http://www.fields-data-recovery.co.uk

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