From owner-freebsd-current@FreeBSD.ORG Thu Apr 21 08:07:49 2011 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D93BB1065670 for ; Thu, 21 Apr 2011 08:07:49 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.cran.org.uk (muon.cran.org.uk [IPv6:2a01:348:0:15:5d59:5c40:0:1]) by mx1.freebsd.org (Postfix) with ESMTP id 624288FC15 for ; Thu, 21 Apr 2011 08:07:49 +0000 (UTC) Received: from muon.cran.org.uk (localhost [127.0.0.1]) by muon.cran.org.uk (Postfix) with ESMTP id 7DB8AE61F3; Thu, 21 Apr 2011 09:07:48 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=cran.org.uk; h=date:from :to:cc:subject:message-id:in-reply-to:references:mime-version :content-type:content-transfer-encoding; s=mail; bh=aL1raZfafEYc 3n9NaRycG6lr6iw=; b=KHLPKQMoLoFO1UD5aEumjJp09u/i4MKf08DxS6JvEEXu KwNYSv0wj4ZGyGt46qzjSq+cmlCcu9LIcL1S+0J+eL5L2D/UeH12EbQ/XdwY6EGK SOsogkvosL5nZZ4WSbIEajpyXdxm2uUcaar6Frab2kJZYq10RIY1tjnSccZfpzQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=cran.org.uk; h=date:from:to :cc:subject:message-id:in-reply-to:references:mime-version :content-type:content-transfer-encoding; q=dns; s=mail; b=vM0gLZ bniLR6VygKoTAxBNUu9SQT9JSqpIqSKzFo0xVhlCOBIrWfP0HRH5wogGACA3iQXx IRNMziWBn1+J5VPIEtk6Vg90KajpNawMDSOIm7L1IZf1vfJAWpvNqxxaQB1VzJyb 9DMRq8Fezw/rwACTN05vc9awn1pdrL0T2iiug= Received: from unknown (188-222-18-231.zone13.bethere.co.uk [188.222.18.231]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA id 53B8FE61F2; Thu, 21 Apr 2011 09:07:48 +0100 (BST) Date: Thu, 21 Apr 2011 09:07:42 +0100 From: Bruce Cran To: "Bjoern A. Zeeb" Message-ID: <20110421090742.00005cc0@unknown> In-Reply-To: References: <4DAEAE1B.70207@FreeBSD.org> <20110420203754.GM85668@acme.spoerlein.net> <4DAF46F8.9040004@FreeBSD.org> X-Mailer: Claws Mail 3.7.8cvs9 (GTK+ 2.16.6; i586-pc-mingw32msvc) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: FreeBSD-Current Subject: Re: Switch from legacy ata(4) to CAM-based ATA X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Apr 2011 08:07:49 -0000 On Thu, 21 Apr 2011 07:51:56 +0000 "Bjoern A. Zeeb" wrote: > a) we MUST HAVE a transition scheme if we cam-base ATA by default. > Something that converts things automatically to whatever? That's not > been done in more than one year. It's not acceptable to update, > reboot and not find the root file system no matter what. We all > agreed on that back then. I do not really care how it's done. I have > been testing cam based ata for a while now on the machines I can cope > with as a developer and even then I screwed the transition partly two > times in the last months. How's a normal user to do that flawlessly? In particular it's fairly common that the mapping isn't adX -> adaX. I've come across cases where ata(4) created ad10, ad12, ad16, etc. which got mapped to ada0, ada1, ada2 etc. When combined with a USB keyboard that often doesn't work at the root mount prompt, recovery can be a bit tricky. -- Bruce Cran