A bad sector on hard drive is a bodily damaged part which can no longer be accessed by the operating system. When this awful part occurs to be a region where you have retained facts and figures, you get the 'cyclic redundancy error' as the functioning scheme cannot get facts and figures from that district. To check for integrity of written data, parity checking bits are written while storing data on a hard drive. So, hard disk recovery is important.
The major cause for bad sectors is a decrease of magnetism of the hard disk surface in certain localities with time. These sectors may furthermore be caused by rapid physical shocks to the hard drive, rapid power shutdown and interruption of reading and composing procedures on the computer disk. A failing read-write head of a hard disk is another origin of bad sectors getting conceived. This may decrease the speed of your computer.
If the bad sectors are initiated due to decrease of magnetization, the impairment is irreversible. However, if the difficulty is due to inconsistencies in parity checking bits, it can be amended by utilizing befitting programs that can rewrite and restore these bits.
There are two built-in programs that you can use to repair bad sectors. One is the CHKDSK and a more advanced version of it called 'Scandisk’. You can rectify bad sectors by running the computer disk scan program on any Windows operating system like Windows XP, Windows Vista and Windows 7:
· Open 'My Computer' and right click on drive volume which is suspected to have bad sectors.
· Click on the properties option and select the 'Tools' tab in the window that opens.
· Click on 'Check Now' under the 'Error Checking' section.
· Then comes two check boxes in another window with ‘Automatically fix file system errors' and 'Scan for and attempt recovery of bad sectors'.
· Select both the options and click on 'Start'. This is done when all the programs running in the operating system are stopped.
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