. This is where all the information we save on our system gets recorded to. Some sectors may have undergone permanent damage. These are knows as bad sectors. They basically are sectors, which due to some damage can no longer be written to. One can easily detect Bad Sectors on the system using utility softwares like CHKDSK or SCANDISK (Microsoft) or Badblocks (Unix-like systems). They are marked as unusable by the programs and the OS then does not save information on them. The OS then saves the information to a new location or rather a new sector.
Problem:
When a system detects bad sectors it generally means that it has run out of spare sectors where the data can be written to. This means that the computer memory is running low. Simply putting it, this means that when you want to save any information, the computer will take a long time to figure out where to save that particular data.
However one must remember to take back-up of data as soon as you find bad sectors. This is just a precaution as bad sectors cause system file corruption. This further leads to slow running of the computer and ultimately stops it from running. Sometimes one may come across the following error messages:
"CRC" or "Cyclic Redundancy Error".
When these sectors go bad there are 2 problems faced by people.
1)The information already stored on them is lost
2)The memory of the system starts reducing.
Solution:
You cannot repair bad sectors. But running a scan can in a way 'inform' the computer about them, so that the OS will not save any more data in that sector. One can follow the steps below to do this themselves:
Press the Start button.
Select My Computer.
Under Hard Disk Drives highlight the disk which you want to scan.
Open the File menu and choose Properties
Open the Tools tab.
Click the Check Now button.
This runs a scan on the hard drive, detects the bad sectors and then marks them as unusable.
But if you have already lost your data due to bad sectors in the computer or your system won't start, you should contact Data Recovery Services (DRS). They have specially trained technicians for hard drive recovery.
Stellar Data Recovery Services, NJ, is one such reliable DRS. They have Class 100 Clean Rooms where they perform all kinds of repair and recovery 'operations' on various kinds of systems. The technicians here are specially trained to handle drives which have been damaged, naturally or due to human error or due to some technical glitches. They recover data from all kinds of hard drives.