Re: Advice regarding servers and Wiping Drives after testing

A since pass with all zero's really won't protect your data from being recovered by more advanced data recovery software let alone alone hardware. Multiple passes isn't much better, but if that's all you got...

You would be better off looking at better utilities if you really need to keep the data from being recovered.

Geoff

Sent from my BlackBerry wireless handheld.

-----Original Message-----
From: cosynmr@xxxxxxxxxxxxxx

Date: Fri, 31 Aug 2007 21:37:08
To:security-basics@xxxxxxxxxxxxxxxxx
Subject: Advice regarding servers and Wiping Drives after testing


Can someone explain why anything would be left after running :

dd if=/dev/zero of=/dev/hda

Wouldn't this write zeros across the entire disk? How could anything
be recovered afterward?

I see osx disk utility can with write zeros once, or write zeros many
times. Is there any advantage in multiple writes?

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