The four most common reasons for data loss are:

* Deletion. You deleted the file by accident during a disk cleanup, or because you thought it was no longer required. It is not in the Recycle Bin. However, the data will still exist until the space it occupied on the disk is are-used by another file.
* Overwriting. You saved a new file over the top of the old one. However, the old data may still exist, and be recoverable.
* File system corruption. The disk suddenly appears empty, or the file and folder names contain gibberish. The files probably still exist, but the pointers to them have been lost or corrupted and the operating system cannot find them.
* Physical damage or hardware failure. You receive error messages when you try to read the disk, or it is not recognised by the computer at all. The data is still likely to be present on the disk itself, but the drive is incapable of accessing it.

In each case, there is a good chance that the data still exists. The computer operating system isnt able to see it, but data recovery software may be able to. If the problem is a hardware failure then a data recovery service may be able to get back the data using special equipment.

Prepare for data recovery

There is one cardinal rule of data recovery: for the best chance of recovering the files you must not write any new data to the disk they were stored on. The old data will only remain on the disk until the space it occupied is used by another file. If the disk is your computers main drive, then the drive is being written to all the time. You should turn off the computer immediately, and use another computer to search for a solution to recover your data. You should put your computers hard disk in another computer to do the data recovery, or use data recovery that runs from a CD or floppy disk, because installing the data recovery software on the drive could overwrite the very data you want to recover.

Choosing the data recovery method

Data recovery tools use different methods to try to recover data. Some tools are designed for recovering deleted files, others are better at restoring overwritten files, or recovering files from disks that are physically damaged. Some data recovery software products have been developed specifically for recovering photo images, or Microsoft Word or Excel document files. Such products may succeed where others fail because they understand what these files look like, and can recognise their data when other clues to its existence have vanished.

It can be difficult to choose the most appropriate data recovery method. Tech-Pro has created a website called Get Data Back. It has a Data Recovery Wizard that asks questions about the data you have lost and how it was lost, and then recommends the product that is most likely to be successful. It will also advise you if it would be better to use a professional data recovery service. Give the Get Data Back data recovery site (http://www.get-data-back.com) a try if you need to recover lost files.

What Are Clean Rooms?

Clean rooms are rooms that have been designed to reduce the level of particulates in the air like dust aand airborne microbes. Clean room construction employs filters extensively. Outside air is filtered to prevent dust entering the room. Filters and processes will be in place inside the room to remove internally generated contaminants during production and working areas are often further filtered locally such as laminar flow bench.

Staff would usually have to enter clean rooms through airlocks and wear protective gear while working inside the rooms.

There are different classes of clean rooms, with each class limiting permissible different numbers of particles per cubic meter, as well as the maximum sizes particles. Thus a Class 1 clean room is one where the number of particles should not exceed 1000 particles per cubic meter.

Clean rooms are used extensively in the pharmaceutical, semiconductor manufacturing and biotech industries. Data recovery centres typically use a Class 100 clean room that has an allowance of 100,000 particles per cubic meter (compared to 35 million particles per cubic meter in a normal room).

Why Use Clean Rooms for Data Recovery?

Clean rooms are used for data recovery to prevent dust, electro static discharges and such disturbances. These kinds of precautions become necessary because even microscopic dust particles can damage the image on the drive platters, and make data recovery difficult.

With each generation of disks, data is packed more and more densely on the disk platters. It is thus increasingly important that data recovery be attempted in exceptionally clean rooms.

Drive manufacturers usually specify that their product guarantee will become void if the drive is opened by anybody other than themselves, or their authorized agents. And typically, one of the conditions they impose on authorized agents is that the disks be opened in clean rooms meeting specified standards.

Thus clean rooms are necessary for data recovery on both performance and product warranty considerations.

Clean Room Data Recovery

Disk drives are opened only in clean rooms and kept there until the recovery is complete and the drive is closed. All devices are also protected against electro-static discharge, physical shocks, temperature fluctuations and electrical disturbances.

Staff wear special clothing while working in the rooms and particle density is constantly monitored using particle counters. A typical objective of clean room data recovery centers is to maintain Class 10 conditions during production.

Conclusion

Data storage media are getting packed with data more and more densely with each new generation of drives. It is thus extremely important to attempt data recovery in exceptionally dust free rooms.

These days, clean room data recovery uses Class 100 clean rooms where the number of particles is reduced by some 350 times compared to normally prevailing particle density.

Clean room data recovery centers actually aim to achieve even higher levels of dust free conditions during production operations. Even minute specks of dust on the drive platters can damage the image on the media, and make data recovery even more difficult, if not impossible.

A hard drive is the most vulnerable part of a computer; it has moving gears and is hence prone to wear and tear. So when you need hard disk data recovery, you must deeply consider the service and practice of the various repair companies in your area. A company that has been around the block more than a few times is ideal.

But more importantly, experts that ask questions and appreciate your situation are a necessity; companies that approach your needs in an impersonal way simply cannot diagnose your computer problems properly. For example, an expert who is on hand to ask specific questions about your hard disk will know whether or not to go about repair with mere software or through more professional means.

There are a variety of problems that lead to hard drive failure. If the hard drive is part of a mirror set, mirrored stripe set, or stripe set with uniformity, then all you will need to do is replace the drive – any lost data will mechanically regenerate.

A local service company can handle all your concerns though. Fixing a hard drive yourself is a tedious process, requiring lots of time and even research. Your next-door neighbor might be a computer geek, but that doesn’t mean his or her advice is remotely accurate. After all, a computer can fail for many different reasons and they are not always easy to pinpoint.

The ideal solution is usually to replace a failed drive and re-establish your backup. This does not always work though, as many people find the necessary backup is outdated or sometimes, non-existent.

If a hard drive is beyond repair, data recovery is obviously not an option. So prepare for unexpected charges; you might have to buy a whole new drive. In this case, just be careful when replacing it, as you don’t want to lose your data.

1. Determine Whats Wrong:

- your computer will not start at all
- blue screen of death
- your computer boots up, but files are missing or are corrupted
- your computer opens up but you cannot seem to find some of your other drives

2. Weird Sounds

Before doing anything, try to hear if there are any sounds coming from your hard drive like a weird scratching, scraping or ticking. If you do hear something like it, then it is enough to conclude that your hardware may be physically damaged. The only possibility for you is to take your computer to a data recovery service where experts might be able to get your data off for you. Of course, this would entail a lot of time and money, so you may want to weigh the value of the data you lost before going a step further.

3. Do-It-Yourself Data Recovery Tips:

- Acquire and download software to help you out
- Not all software is free
- Attach your hard drive to another computer if your computer has only a single drive. This is to provide enough space to store all your data
- If your computer has a rollback safety feature, try and roll back to a previous saved state to restore damage

4. Possible Causes Of Damage:

- Lightning strike
- Virus
- Hard drive failure
- Accidental deletion of data
- Water/fire damage
- Improper software installation overwriting important data

5. Be Prepared – Make Backups

Having back-ups is the only solution to your data loss problems. They come in various forms:

- Virus protection software
- Personal firewall
- CD backup
- DVD backup
- RAID hard drive

6. Back-Up Tips

- Try investing in backup software of good quality and performance. Products that leave you secured from data loss disaster or further computer file crashes are always a good investment.
- Double check the restore capability. The software should have features that guarantee that while the product is performing your back up it checks all the data down to the level of bits and bytes.
- Double check the capability of your back up medium. Invest on the best back up software you can get and at the same time, for the purposes of prevention, start manually and diligently backing up your data regularly.
- Do an inspection of your hard drives from time to time. Always be on guard of viruses and spywares that can possibly crash your hardware. Defrag your computer regularly to correct errors and check bad sectors as soon as they are detected.
- Be sure you conduct a proper documentation of what transpired during the data loss disaster, what you have observed, as it progresses and the things you attempted doing to give your files the first aid. This will help the data recovery expert to track the problem and recommend the best solution for your problem.