HDD Regenerator – better than
chkdsk c: /R
A more powerful tool than Checkdisk. I have saved many disks with this tool. It recreates the data that is stored in a bad sector on the disk and marks the sector as not applicable. It makes the drive a little less, but what remains is good enough to be used.
Link to HDD Regenerator: http://www.dposoft.net/hdd.html