[CentOS] Utility to zero unused blocks on disk
John R Pierce
pierce at hogranch.com
Mon Feb 8 23:45:32 UTC 2016
On 2/8/2016 3:33 PM, Valeri Galtsev wrote:
> DRAM had more persistent imprint of information that was sitting in it,
> which appears much harder to destroy than information on hard drive.
well aware of that. 30 years ago a friend and I built a specialized
video card for a consulting project.... discovered on the prototype
that we could power it down, go home, come back the next day, and power
it up, and sufficient image remained in the DRAM to be totally
recognizable. sure, it had 'noise' bits all over it, but whatever was
on the screen the day before was still visible.
--
john r pierce, recycling bits in santa cruz
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