Linux tools to wipe out a hard drive
Hi guys!
Here is the thing: There's confidential information in a client's system that could lead to major problems if this should fall into the wrong hands. I have to make sure the data contained in this hard drive is completely cleaned, and that NO ONE in the world could ever recover it, even forensically. :) Would you know about:
I can do the wipe using EnCase software from Guidance Software, but I find it very time consuming for this task. Thanks a lot! sl33p |
here's a light way to do it.
dd if=/tmp/0 of=/dev/sda1 bs=1 dd if=/tmp/1 of=/dev/sda1 bs=1 dd if=/tmp/2 of=/dev/sda1 bs=1 /tmp/0 has 1 byte that is 0 /tmp/1 has 1 byte that is 1 /tmp/2 has 1 byte that is 2 by writing all of the drive with 3 bytes, you make forensics have to go back 4 versions to find data. If you need more than that, just magnetize the drive. |
dd
dban |
Simply
Code:
dd if=/dev/zero of=/dev/sda1 Code:
dd if=/dev/urandom of=/dev/sda1 EDIT: if it's the whole HDD you need to wipe rather than the first partition change /dev/sda1 to /dev/sda in the above suggestions. "sda" is, of course (!) just an example. |
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DBAN is a commonly used tool for sanitizing hard drives and is approved by many government agencies for clearing sensitive data. If it's good enough for them, it's probably good enough for you. However, as others mentioned, the only way to guarantee that no one can retrieve data is to physically destroy the drives.
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If you want maximum confidence that the data is unrecoverable even with electron microscopes (I don't think any lab exists that has successfully used this technology for this purpose with any degree of accuracy), use DBAN (like many above say).
If you don't plan on keeping the HDD, then simply use thermite: http://en.wikipedia.org/wiki/Aluminothermic_reaction You can also use a powerful magnet and rub it on the platters ... or a sledgehammer, or explosives, or corrosives, or many things... In the real world you can just use 'dd if=/dev/zero of=/dev/sda'. |
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which can be used like this: Code:
shred -n {numberOfIterations} -vz {/dev/hardDriveOrPartitionHere} Hope this helps. Regards, Vhann |
We are required to use BCWipe.
BCWipe |
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Oh wow apparently the same is true for BCWipe. Learn something new every day. |
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I use my good ole friend Mr. Crowbar.
A few hits (full swings) with him and the drive is no good. Make sure you hit it hard enough so it damages the platters, and I do a few hits on each side. I know someone mentioned sledgehammer, but that gets a little heavy after a while, especially if you are trying to damage the drive in multiple places and doing several drives at once. I find the crowbar is the perfect weight. |
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