Always encountering failed non fatal error


New Member
Hi I have a laptop, basically it's not working , and I have to boot from cd, so I need to wipe the hard disc. Tried killdisc and it worked fine but is apparently not secure , with dban eraser it keeps saying non fatal error may be a bad sector it always does this right at the end after about 3 or 8 hours on the last pass ! Does this mean it has deleted the info or not ?as it was only the last pass when things went wrong. I have tried both versions and no luck !
Does anybody know any other secure disc wipers ?
I'm getting something similar.

It runs ok but near the end I get
"Finished with none fatal errors"
Then it say something about bad sectors and then states the start and finish time i ran the dban.