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Re: Erasing a hard disk easily
From: Thomas Sjögren <thomas () northernsecurity net>
Date: Tue, 13 Jul 2004 01:24:55 +0200

On Mon, Jul 12, 2004 at 11:23:24PM +0200, Maarten wrote:
So, if you want to erase the data but keep the drives operational too, you 
have but one means left: by plain old formatting.  Depending on the level of 
security you want, you can opt for:

* DOS/Windows format (beware: this does not erase ANY data at all !!)
* Low-level format / wipe (with special tools, level depends on the tool used) 
* Linux dd overwriting using /dev/zero (fairly good if used multiple times)
* Linux dd overwriting using random data (excellent if used multiple times)
* Department-of-defense level (dd as above but lots more times (like 10+))

0. Manuallty wipe (shred, wipe, PGPs secure deletion utility, ...) files that
   you know contains info you dont want to share.
1. Remove all partitions (fdisk on a floppy).
2. Create a new partition covering the whole disk and reformat it.
3. Use Autoclave[1] or write your own, similar but updated, tool.

[1] http://staff.washington.edu/jdlarios/autoclave/

== thomas () northernsecurity net | thomas () se linux org
== Encrypted e-mails preferred | GPG KeyID: 114AA85C

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