A computer’s hard disk drive is the central data repository for the entire system. All sorts of important files are stored on a hard drive, from the operating system itself to important work and personal data such as photographs and financial information. However, as with any component of a PC, hard drives can fail for a number of different reasons.
Few things are more distressing than trying to turn on your computer, only to discover that it will not boot up. In many cases, this is the result of a hard drive failure. A skilled technician may be able to provide the skills required, repair the damage and recover the data from the drive. However, his chances of success depend in a large part upon the cause of the failure.
One common cause of hard disk failure is an electrical problem. If may be a surge of electricity to your computer and the circuits can become damaged, making it difficult or impossible to control the hard drive. Common symptoms of this type of failure include a drive that powers on but does nothing, or a drive that makes a clicking sound.
In these cases, the data on the hard drive may still be intact, so retrieving it may not be terribly difficult. However, you may have to have certain parts of your PC replaced, or the technician may need to manually copy the files from the damaged drive onto a new one.
Hard drives are also prone to mechanical failures. Most hard drives involve a platter that spins at very high speeds. The read and write head hovers a fraction of a centimetre above this platter. In rare cases, a collision can occur. This is known as a “head crash.”
These collisions can severely damage the hard drive and lead to the loss of data. Recovering data from a hard drive after a head crash can be very difficult, and requires the use of specialised equipment such as a clean room. If your hard drive is making grinding noises, or if it makes no noise at all, this may indicate a mechanical problem.
Hard drives can also fail for non-physical reasons. In these cases, the drive itself is fine, but the data on the drive has become damaged or corrupted so that the computer can no longer access the files and folders. For example, if the information that tells the computer where each file is located becomes corrupted, you will be unable to open your files.
Fortunately, fixing these logical failures is generally a simple procedure. The technician will simply have to replace the corrupted data with new copies of the proper information. Once this has been done, your system will once again be able to access to your files. Even if some of your files are damaged, a skilled technician may be able to retrieve the remaining lost data.
Hard drives can crash and fail for many different reasons. Properly diagnosing the cause of the failure is the first step that a good hard drive recovery technician must take in order to solve the problem.