Low Level Format Hardisk

You can do a low level format fix your hardisk bad sectors. But remember to back up all your data. Because low leve format will erase all your data.
Below is the list of links to download software to diagnose, fix and low level format your harddisk. Please download the software according to your hardisk brand.

IBM(Hitachi)
http://www.hgst.com/hdd/support/download.htm
Seagate
http://www.seagate.com/support/disc/utils.html
Maxtor
http://www.maxtor.com/en/support/downloads/index.htm
Fujitsu
http://www.fel.fujitsu.com/home/drivers.asp?L=en&CID=1
Samsung
http://www.samsung.com/Products/HardDiskDrive/utilities/index.htm
FAQ: Low level format
Western Digital
http://support.wdc.com/download/index.asp