From owner-freebsd-geom@FreeBSD.ORG  Fri Nov  7 00:10:54 2008
Return-Path: <owner-freebsd-geom@FreeBSD.ORG>
Delivered-To: freebsd-geom@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6B5181065672
	for <freebsd-geom@freebsd.org>; Fri,  7 Nov 2008 00:10:54 +0000 (UTC)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu
	[128.208.78.105])
	by mx1.freebsd.org (Postfix) with ESMTP id 4FBA48FC13
	for <freebsd-geom@freebsd.org>; Fri,  7 Nov 2008 00:10:54 +0000 (UTC)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (localhost.apl.washington.edu
	[127.0.0.1])
	by troutmask.apl.washington.edu (8.14.3/8.14.3) with ESMTP id
	mA70As7p090785
	for <freebsd-geom@freebsd.org>; Thu, 6 Nov 2008 16:10:54 -0800 (PST)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: (from sgk@localhost)
	by troutmask.apl.washington.edu (8.14.3/8.14.3/Submit) id
	mA70AsKG090784
	for freebsd-geom@freebsd.org; Thu, 6 Nov 2008 16:10:54 -0800 (PST)
	(envelope-from sgk)
Date: Thu, 6 Nov 2008 16:10:54 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: freebsd-geom@freebsd.org
Message-ID: <20081107001054.GA90684@troutmask.apl.washington.edu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.4.2.3i
Subject: gmirror and nfs
X-BeenThere: freebsd-geom@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: GEOM-specific discussions and implementations
	<freebsd-geom.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-geom>
List-Post: <mailto:freebsd-geom@freebsd.org>
List-Help: <mailto:freebsd-geom-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-geom>,
	<mailto:freebsd-geom-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 07 Nov 2008 00:10:54 -0000

With Brandon and Kurt's help, I've successfully constructed
the gmirror of a partition over the network.  Now, onto another
(possibly dumb) question.  

What I have is

n18:kargl[213] df -h
Filesystem           Size    Used   Avail Capacity  Mounted on
/dev/ad4s1a          248M     90M    138M    40%    /
devfs                1.0K    1.0K      0B   100%    /dev
/dev/ad4s1d          3.9G    419M    3.2G    11%    /usr
node10:/home         189G     91G     84G    52%    /usr/home
node10:/usr/local     19G     10G    7.4G    58%    /usr/local
/dev/mirror/data     218G     20G    180G    10%    /data
n18:kargl[214] gmirror status
       Name    Status  Components
mirror/data  COMPLETE  ad4s1e
                       ggate0

In the above, ad4s1e is n18:/dev/ad4s1 and ggate0 is n19:/dev/ad4s1.
On the master node, n10, in my cluster, I tried to do

master:root:[213] mount_nfs -o tcp n18:/data /n18
mount_nfs: /n18: Input/output error

So, it appears the underlying /dev/mirror/data is not compatible
with NFS.  Is ggated capable of exporting the gmirror to another
node?

-- 
Steve