From owner-freebsd-fs@FreeBSD.ORG  Tue Sep 18 11:20:50 2012
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To: FreeBSD FS <freebsd-fs@freebsd.org>, John <jwd@freebsd.org>
References: <20120918010812.GA71005@FreeBSD.org>
Date: Tue, 18 Sep 2012 06:20:35 -0500
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From: Mark Felder <feld@feld.me>
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Subject: Re: XFS/istgt backed 8TB xfs filesystem configuration?
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Am I correct that you're proposing the following configuration:

FreeBSD Server -> zpool -> zvol -> istgt -> Linux server -> iscsi  
initiator -> XFS filesystem

If so then yes, I am using a setup like this. It works quite well. :-)