From owner-freebsd-arm@freebsd.org  Mon Jul 15 09:22:19 2019
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From: Jamie Landeg-Jones <jamie@catflap.org>
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Date: Mon, 15 Jul 2019 10:22:18 +0100
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To: sparvu@kronometrix.org, jamie@catflap.org, freebsd-arm@freebsd.org
Subject: Re: recreate FreeBSD 12 ARM image
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Jamie Landeg-Jones <jamie@catflap.org> wrote:

> I.E. Stick the card into another system, don't mount it, but do:
>
> dd if=/dev/DEVICE-NAME bs=1m | gzip -c > img.gz
>
> This will copy the disk image, and compress it with gzip before saving it
> to the file.

P.S. Before you unmount the "live" system you want to copy, do:

rm /etc/hostid

or else all your installs will have the same id!