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Date:      Thu, 13 Apr 2017 10:03:02 +0100
From:      tech-lists <tech-lists@zyxst.net>
To:        freebsd-questions@freebsd.org
Subject:   hopefully simple query regarding dd
Message-ID:  <7ed0944d-56d0-fc10-629b-b90067f48651@zyxst.net>

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Hello questions@

I couldn't find an an answer to this hopefully non-silly question and
can't test it meself without possibly risking a hd. Basically what I
want to know is this. Can I do this:

dd if=/dev/ada0 of=/dev/ada0

to refresh the disk, and *expect the outcome to be non-destructive for
the disk*. That bit is important. By non-destructive, I mean for the
data already on it.

Can I do this multiuser or do I need to boot to a rescue environment
beforehand?

thanks,
-- 
J.



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