Which information can we recover from an hard disk.

Bruce Chambers wrote:
> Dennis Dow wrote:
>>
>>
>> 7 times is an urban legend.
>>
>
>
> Not an "urban legend," at all, but rather a widely accepted industry
> standard. In fact, it's even mandatory, by law, when wiping hard drives
> belonging to some government agencies. (This is not to say that it's a
> valid number, just that it's not derived from a baseless rumor, as you
> imply.)
>
>
Well, as I already indicated, I suggest you read Peter Guttmann's work
on the topic. The 7 times came from his original research and even he
disputes the validity with modern drives.