[vox-tech] Most efficient way to wipe hard drives

Tony Cratz cratz at hematite.com
Fri Sep 11 15:22:55 PDT 2009


Bill Broadley wrote:
> Well shred is for files, not disks.  Erasing files is much trickier.  Most
> editors make backup copies, undo logs, etc.  Not to mention every time you
> edit a file the previous version (typically) gets deleted, thus those blocks
> are on the free list and floating around your disk.  Not to mention any blocks
> that are swapped out.
> 
> I'd consider shred radically less secure than just dd'ing the entire disk,
> which is itself less secure than a secure erase.


	Us old school Unix people use to say that everything in Unix was
	a file, be it a disk or a normal file.


								Tony


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