How to erase data on a drive that won't mount?

I've been racking my brain on this problem for a while now and figured I'd throw this situation out to the crowd to see what kind of ingenious answers I could get to this problem.

I have a failed hard drive that I'd like to send back to get replaced but obviously want all my data wiped first. The problem is that the drive has failed so miserably that it won't even mount to any system in order to perform any sort of wiping. I've connected it to my system directly, via a USB to IDE adapter, and via an eSATA adapter in both Windows and Linux to no avail. Sometimes it will show up in the Device Manager under Hard Drives, but that's as far as it gets - it's never assigned a letter and doesn't show up in Disk Manager. It doesn't show up in Ubuntu when I perform an fdisk either so I can't perform a DD.

This is a bit of a catch 22 as the hard drive has failed to the point where it can't be read, but I'm not sure what measures are going to be employed to attempt to validate and read the data at the manufacturer when they test it for failure. If the drive all of a sudden starts working, there is too much personal data on there for me to just hope doesn't turn up.

Any ideas (other than mounting another similar drive's controller to it)?

For me, if there's that much personal data on it, I wouldn't send it back at all but instead just buy a knew drive. Then to insure that the hard drive wont fall into the wrong hands and attempt to recover the data, I take a sledge hammer to them. Then dispose of the mess properly. POM as we call it....peace of mind....

Yea, that's pretty much where I stand on this. It isn't worth it at this point, even though HDD's have skyrocketed due to the artificial inflation. But, I wanted to throw it out there in case anyone had a novel idea I hadn't thought of.

FliGi7 said:

Any ideas (other than mounting another similar drive's controller to it)?

Well, that's what I was going to suggest (assuming could can lay your hands on an identical drive) but that assumes you REALLY REALLY want to try to recover the data. But barring that, I've got a couple of major magnets in my shop, one is used to pick-up nails & screws & whatnot and is very powerful, would likely destroy any drive...

In the end I doubt when you RMA the thing that anything is done beyond a cursory attempt perhaps to see if they can mount it. But if you're REALLY worried the contents might be extracted, then just destroy it.

Without a doubt, removing the harddisk's airtight seal will pretty much render it unusable due to near-instant contamination. It will practically guarantee a headcrash the next time the drive is powered up and starts spinning while the heads load onto the surface.

But - headcrash aside - it will not destroy any data on the platters whatsoever. Someone could even steal such an opened drive and simply send it in for professional data recovery - and all they'll need to do is polish and clean the platters, then go on their merry way about reading all the data straight off without much effort.

Hammer treatment? Sounds good to me. :)

You would need really, really strong magnets to destroy large amounts of data on the disk. I think the general consensus is the same conclusion I had reached, so it's good to know I haven't missed anything. Thanks for the feedback, everyone.