Wiping Out Data
matthew.flaschen at gatech.edu
Wed Mar 28 18:01:22 UTC 2007
Jeffrey F. Bloss wrote:
> I don't believe this is correct because dd doesn't work at that
> level. The command you suggested... 'dd if=/dev/random of=/dev/sdb'
> *should* fail with a "no media" error unless sdb is mounted.
I did not suggest that command. I suggested shred , and said I had
heard the dd command /wasn't/ equivalent (can't confirm or deny). I
tested the shred command before posting, and it definitely works without
> it should fail either way because you're not pointing dd at an
> accessible target partition.
That was just an oversight, but again I don't recommend dd. I did
correctly specify partition when describing the shred.
> I'm not sure mkfs does anything significant as far as "bit wiping" goes
> either, although I'm not up on the mechanics of how it creates file
It may zero everything (not sure), but the real data destruction was
already done by shred. mkfs is just to recreate the filesystem after
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