And if they had a steel plate on them, it would be bent to the shape of
the casing, cartridge would not be insertable in a tape drive. Just so
the person claiming or disposing of them does not have a PDA in his\her
pocket...:)
From what you said earlier, being out in the boonies south of Punta
Gorda, I did not immediately realize you were talking about the field
generator for a magnetic resonance imager. Yes, in spades that would do
it (at least 100 times over what was needed).
John.
Todd Robinson wrote:
>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
>>>>
>>>>
>>>>
>>>>
>>>>
>>-------------------
>>
>>
>>
>>
>>
>
>
>
>
-- _______________________________________________________________________________ Registered Linux User #276212, Machine #158988 "Use what works best for your needs, at minimum total cost of ownership."
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