Hi! I'm trying to secure erase this HDD because I found 120+ bad blocks when I did a surface scan with TechTools. I read somewhere that a secure erase by zeroing out the data with one pass would move the blocks to a part of the HDD where they can be ignored. I've tried doing this with disk utility and at some point during the wipe it gives me an error saying it can't be completed because of an error. This happened 3 times. I'm tryin again using TechTools "Wipe Data" feature and while I haven't come across an error it for sure feels like it's gotten to a point where it won't be able to do anymore. It's been going for longer than 12 hours and for the last hour or so it hasn't moved at all. The drive is a 500gb WD Blue. Any ideas what to do, or if I even need to wipe it again?