I was formatting a drive as I'm selling off my old mac, and for some reason decided that not only should I zero out the drive but also select the 8 way random formatting option. I assumed that in starting it around 7 last night it would be close to done by sometime this afternoon, but when I checked it before leaving for work this morning it had barely even started. The problem is that someone was supposed to pick this up from me tonight. I have no option to cancel but do have the option to quit Disk Utility - which gives me a warning that doing so may leave the disk unusable. Since I'm planning to reformat and re-install anyway, is there any harm in just quitting disk utility and starting over with only zeroing out the drive? Or am I really at risk to cause damage to the drive?