You will need
  • A special software.
Pay attention to the nature of the work HDD. In some cases, there are visual changes that are "thought" hard drive, its periodic "freezes". The computer fan works in all and almost never turns off. Or, on the contrary, it is not noticable at all. In this case, you need to check the HDD temperature with the help of special software. Suitable software quite a lot, for example, you can use the services of Everest. Not recommended to touch the part of the computer case and laptop where is the hard drive, because you can get burned.
Install the program and spend monitoring the temperature of the HDD, which should not exceed 45 degrees Celsius. If the value is greater need to inspect the fan and clean the fan grille dust-free to HDD cooling was effective. It should be noted that overcooling of hard drive leads to failure, so the installation of an excessive number of coolers may result in damage and stopping the HDD.
After processing the temperature data, run the utility S. M. A. R. T., which allows to evaluate the state of the hard disk of the computer. In the process of testing the S. M. A. R. T. checks are critical to HDD performance parameters, such as: Raw Read Error Rate, Spin-up time, Uncorrectable Sector Unit and many others. Found S. M. A. R. T. defective sector are presented to the user in the report on the test results.
After the detection of bad-sectors download from the Internet and install it on your computer one of the many utilities for HDD diagnostics, which is free to access. Professionals recommend such as HDDScan, HDD Health or HD Tune. If the test with the help of this software will reveal a large number of bad –sectors, independent attempts to save the data from the disk will only worsen the situation. In this case, it is strongly recommended to use the services of specialists.
Try to copy the contents of the HDD before it stops working completely. Use a special program for data recovery. One of the best is EasyRecovery. There are other utilities, but they are less known. It should be especially noted that the data recovery process is possible only in a small number of the affected sectors of the HDD. If a lot of them, the hike in service cannot be avoided.