Wednesday, August 17, 2011

Bad Sector on Hard Disk

Modern disk map bad sector to good sector to avoid any sort of error due to bad sector. If a large number of sector mapped to another sectors that means disk is going to fail

smartctl command is very helpful command to diagnose disk related problems

To instruct for selftest , we can issue following command

root# smartctl -l selftest /dev/sda

To get attributes list you can use following command

root#smartctl -A /dev/sda

The output of above command is self explanatory and help you to recognize if there is any problem on hard disk.