I could give them to my wife and she could set them next to the MRI
magnet at work. That's a 1 Tesla magnet. At least a couple hundred
thousand times more powerful than an electric bulk eraser. It would at
least be interesting to see what was left. My cousin lays carpet, he
did a job down at Sarasota Memorial in their MRI room. Glue down type
carpet, use a 50 lb. iron roller to roll it out. No one warned him
about not taking anything magnetic in, he was laying carpet after all.
Got the roller about 10 ft from the magnet and he couldn't hold it back.
Rolled right into the outer casing. Put a little dent in it, no damage.
Had to wait 3 weeks for the next maintenance cycle when they turned it
off to get the roller back.
Todd
> -----Original Message-----
> From: slug@lists.nks.net [mailto:slug@lists.nks.net] On
> Behalf Of david@crbtechnologies.com
> Sent: Wednesday, June 05, 2002 7:19 PM
> To: slug@nks.net
> Subject: Re: Re: [SLUG] Erasing backup tapes?
>
>
> The only way to totally destroy them is to physically remove
> the tape from the cart. and cut it up, shred it, etc. When I
> worked for the Govt. we used to test ways to recover data
> from tapes that had been "fried" and it was not fool-proof.
>
> Dave
>
> >No need to get high-tech, park 'em next to a large magnet for a few
> >seconds.
> >
> >Ed.
> >
> >Ben Ostrowsky wrote:
> >
> >> I've got several dozen DDS tapes that I'd like to throw
> out. Before
> >> I do that, however, I'd like to make it non-trivial to
> read the data
> >> currently on them.
> >>
> >> I can't seem to figure out bcwipe; it works on files and block
> >> devices.
> >> I'm not sure what a block device is, but dmesg says
> "Attached scsi tape
> >> st0 at scsi1, channel 0, id 6, lun 0".
> >>
> >> [root@snoopy /tmp]# bcwipe -v -b /dev/st0
> >> Wipe /dev/st0 (y/[n]/a)?y
> >> Wiping device /dev/st0
> >> Writing to /dev/st0: Input/output error
> >>
> >> Perhaps it's not a block device:
> >>
> >> crw-rw---- 1 root disk 9, 0 Mar 23 2001 /dev/st0
> >>
> >> Any ideas how I can wipe these tapes? I don't have easy
> access to an
> >> MRI or a mile of copper wire, and I'd rather not trust the
> >> demagnetizer at the library -- it's not designed for this.
> >>
> >> I've been told that writing from /dev/urandom until the
> tape fills up
> >> would do the trick, but I don't even know how to do that!
> >>
> >> Haaaaalp!
> >>
> >> Ben
> >>
> >>
> >>
> >
>
> -------------------
>
>
>
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