From owner-freebsd-questions@FreeBSD.ORG  Sun Feb  2 21:37:45 2014
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 0CEB57D5
 for <freebsd-questions@freebsd.org>; Sun,  2 Feb 2014 21:37:45 +0000 (UTC)
Received: from outbound-queue-2.mail.thdo.gradwell.net
 (outbound-queue-2.mail.thdo.gradwell.net [212.11.70.35])
 by mx1.freebsd.org (Postfix) with ESMTP id C760D11D1
 for <freebsd-questions@freebsd.org>; Sun,  2 Feb 2014 21:37:44 +0000 (UTC)
Received: from outbound-edge-2.mail.thdo.gradwell.net (bonnie.gradwell.net
 [212.11.70.2])
 by outbound-queue-2.mail.thdo.gradwell.net (Postfix) with ESMTP id DDE9622DE7
 for <freebsd-questions@freebsd.org>; Sun,  2 Feb 2014 21:37:34 +0000 (GMT)
Received: from cpc7-jarr12-2-0-cust882.16-2.cable.virginm.net (HELO
 amd.asgard.uk) (92.238.71.115)
 (smtp-auth username fbsd%pop3.dgmm.net, mechanism plain)
 by outbound-edge-2.mail.thdo.gradwell.net (qpsmtpd/0.83) with ESMTPA;
 Sun, 02 Feb 2014 21:37:34 +0000
From: dgmm <freebsd01@dgmm.net>
To: freebsd-questions@freebsd.org
Subject: Re: /tank/ROOT/default
Date: Sun, 2 Feb 2014 21:37:32 +0000
User-Agent: KMail/1.13.7 (FreeBSD/9.1-RELEASE-p10; KDE/4.10.5; amd64; ; )
References: <20140202145457.0e643728@europa>
In-Reply-To: <20140202145457.0e643728@europa>
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201402022137.32874.freebsd01@dgmm.net>
X-Gradwell-MongoId: 52eeba9e.140bc-7c8a-2
X-Gradwell-Auth-Method: mailbox
X-Gradwell-Auth-Credentials: fbsd@pop3.dgmm.net
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 02 Feb 2014 21:37:45 -0000

On Sunday 02 February 2014 19:54:57 Mike Jeays wrote:
> I just installed PC-BSD 10.0 under VirtualBox. Very easy, smooth
> installation, but what is the meaning of 'tank/ROOT/default' etc in the df
> output? I have never seen 'tank' before in this context.

Not a 10.0 user, but my first guess is you installed using ZFS.

tank seems to be the default example for a ZFS pool.