From owner-freebsd-security@FreeBSD.ORG  Wed Nov  7 06:47:33 2012
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From: "Dewayne Geraghty" <dewayne.geraghty@heuristicsystems.com.au>
To: "'Paul Schenkeveld'" <freebsd@psconsult.nl>
References: <20121106184658.GA24262@psconsult.nl>
 <20121106192704.GM73505@kib.kiev.ua>
Subject: RE: md(4) (swap-base) disks not cleaned on creation
Date: Wed, 7 Nov 2012 17:45:05 +1100
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Paul, 
This is akin to dd if=/dev/ada0s1b of=/tmp/File 
Where ada01b is the swap partition and then reading through the output. Its really nothing to be concerned about, and not worth
zeroing the page for :)

Regards, Dewayne.