In my segate 80GB HDD there was 4bad sector. They were making so much problems, even was corrupting OS without any notice. Now i did a FULL ERASE by using seatools of segate. After that CHKDSK also not finding any badsector. And the LONG TEST of seatools also not finding any bad sector. Actually i was wondering to know how a physical problem of HDD is repaired by FULL ERASE. Anyone have any info regarding this please share with me.