[CentOS] Utility to zero unused blocks on disk

Tue Feb 9 00:38:35 UTC 2016
Always Learning <centos at u64.u22.net>

On Mon, 2016-02-08 at 14:22 -0800, John R Pierce wrote:

> the only truly safe way to destroy data on magnetic media is to grind 
> the media up into filings or melt it down in a furnace.

I unscrew the casing, extract the disk platter(s), slide a very strong
magnet over both sides of the platter surface then bend the platter in

How secure is that ?

I can't afford a machine that grinds everything into dust particles.


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