Re: zero filling a storage device (was: dd and mbr)

Reply: Ralf Mardorf : "Re: zero filling a storage device (was: dd and mbr)"
In reply to: Greg 'groggy' Lehey : "Re: zero filling a storage device (was: dd and mbr)"
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From: Ralf Mardorf <ralf-mardorf_at_riseup.net>
Date: Fri, 14 Jan 2022 17:00:39 UTC

Hi,

zero filling is fishy for several reasons. It's never secure!
However, I won't comment zero filling. I'm not an expert and to lazy to
search for links.

Related to the addressable blocks and real physical locations I've got
a link at hand.

On Fri, 14 Jan 2022 15:55:58 +1100, Greg 'groggy' Lehey wrote:
>proof of the contrary

Due to
https://en.wikipedia.org/wiki/Wear_leveling
the only way that could be (but not necessarily is) secure, is a secure
erase command provided by the firmware.

Regards,
Ralf