So I'd like to get rid of a bunch of drives I've had laying around by recycling them at Best Buy. I'm pretty sure all these drives were just media drives from prior iterations of my home server but I rather play it safe and wipe.  I don't want the process to take days for each drive so I did a 3 pass wipe using "Eraser".  The process took about 7 hours and seems to have done nothing to prevent recovery of files as a lot that was there before the wiping is still there.   Is there a bett