From owner-freebsd-questions@FreeBSD.ORG  Fri Dec  5 23:51:11 2014
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id CF503CF9
 for <freebsd-questions@freebsd.org>; Fri,  5 Dec 2014 23:51:11 +0000 (UTC)
Received: from plane.gmane.org (plane.gmane.org [80.91.229.3])
 (using TLSv1 with cipher AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 8CD3EAE0
 for <freebsd-questions@freebsd.org>; Fri,  5 Dec 2014 23:51:11 +0000 (UTC)
Received: from list by plane.gmane.org with local (Exim 4.69)
 (envelope-from <freebsd-questions@m.gmane.org>) id 1Xx2eM-00089z-Sf
 for freebsd-questions@freebsd.org; Sat, 06 Dec 2014 00:51:02 +0100
Received: from p4fddc314.dip0.t-ipconnect.de ([79.221.195.20])
 by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
 id 1AlnuQ-0007hv-00
 for <freebsd-questions@freebsd.org>; Sat, 06 Dec 2014 00:51:02 +0100
Received: from christian.baer by p4fddc314.dip0.t-ipconnect.de with local
 (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00
 for <freebsd-questions@freebsd.org>; Sat, 06 Dec 2014 00:51:02 +0100
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-questions@freebsd.org
From: Christian Baer <christian.baer@uni-dortmund.de>
Subject: Mounting swap without device name
Date: Sat, 06 Dec 2014 00:50:50 +0100
Lines: 22
Message-ID: <m5tgcq$f9i$1@ger.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7Bit
X-Complaints-To: usenet@ger.gmane.org
X-Gmane-NNTP-Posting-Host: p4fddc314.dip0.t-ipconnect.de
User-Agent: KNode/4.14.2
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.18-1
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: Fri, 05 Dec 2014 23:51:11 -0000

Good evening, dear readers! :-)

Changing device IDs can be a pain. Adding a hard drive to my system results 
in the system not booting anymore because the device name for / changes 
after the second drive is detected. I have overcome this by having an fstab 
like this:

# Device        Mountpoint      FStype  Options Dump    Pass#
/dev/ufs/root   /               ufs     rw      1       1
/dev/ada0s3b    none            swap    sw      0       0
/dev/ufs/var    /var            ufs     rw      2       2
/dev/ufs/usr    /usr            ufs     rw      2       2
proc            /proc           procfs  rw      0       0

As is plain to see, my machine boots from an MBR drive (in this case an 
SSD). Note the swap drive however. I have not found a way so far to label 
the swap partition in a way that I can make the system find it at boot time.

Is there a way to do this and if so, then how?

Best regards,
Chris