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From: andy thomas <andy@time-domain.co.uk>
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To: Rainer Duffner <rainer@ultra-secure.de>
Subject: Re: Is it possible to access a jailed zfs filesystem outside the jail?
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On Sun, 16 Mar 2014, Rainer Duffner wrote:

> Hi,
>
> to make backup simpler, I'd like to be able to mount the filesystems I
> dedicated to jails on the host as well (beats the purpose a bit, I
> know).
> I only need read-only access (for backup).
>
> Is that possible?

Yes, jail filesystems are part of the host's filesystem so if your happens 
to be located at /home/jails/myjail then you'll find all the jail file 
under there and can back them up in the usual way.

Andy