Disk Utility - Zero All Data in Yosemite

[themagichoof]

I've never had to do this to a disk in Yosemite but I need to zero all of the data which will map the bad sectors on a drive. In the Security Options in Disk Utility, there's a slider that gives different options. The 2nd option says it will write zeroes over the entire disk in one pass, so I guess that's the zero all data option?

I'm guessing that will automatically mark the bad sectors even though it doesn't say it.

 

[bobtomay]

Moving the slider one click to the overwrite with zeros is the correct option.