fsck on FAT32 filesystem?

[Daniel Feenberg]

On Thu, 19 Jul 2012, Carmel wrote:

> On Thu, 19 Jul 2012 10:15:17 +0200 (CEST)
> Wojciech Puchar articulated:
>
>>>  1) There's a _reason_ the gov't requires hard drives with anthing
>>> higher than 'somewhat' classified data on them to be =physically=
>>> destroyed before leving the secure area.
>>
>> no. for modern hard drives it was already proved that
>>
>> dd if=/dev/zero of=/dev/disk bs=1m
>>
>> is enough to make data unreadable.
>>
>> for very old drives it may not
>
> Would you be so kind as to point out the proof of that statement?
> Please provide an address or location where the documentation
> supporting that statement can be found. By the way, "NOT READABLE" is
> not equal to "UNRECOVERABLE".

I hesitate to intervene in this dispute, but my posting "Can intelligence 
agencies recover overwritten data?" at

    http://www.nber.org/sys-admin/overwritten-data-gutmann.html

will iluminate this discussion.

dan feenberg

>
> -- 
> Carmel ?
> carmel_ny at hotmail.com
>
>
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