From owner-freebsd-stable@FreeBSD.ORG Wed Apr 6 08:56:39 2005 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A507216A4CE for ; Wed, 6 Apr 2005 08:56:39 +0000 (GMT) Received: from blue.servers.aueb.gr (blue.servers.aueb.gr [195.251.255.132]) by mx1.FreeBSD.org (Postfix) with ESMTP id CA01843D49 for ; Wed, 6 Apr 2005 08:56:38 +0000 (GMT) (envelope-from dds@aueb.gr) Received: from [195.251.249.155] ([::ffff:195.251.249.155]) by blue.servers.aueb.gr with esmtp; Wed, 06 Apr 2005 11:57:08 +0300 Message-ID: <4253A443.5010704@aueb.gr> Date: Wed, 06 Apr 2005 12:56:35 +0400 From: Diomidis Spinellis User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3) Gecko/20040910 X-Accept-Language: en-us, en, el, de MIME-Version: 1.0 To: Mike Harding References: <1112401017.46421.8.camel@bsd.mvh> In-Reply-To: <1112401017.46421.8.camel@bsd.mvh> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: stable@FreeBSD.ORG Subject: Re: Mounting a powered-down HDD renders system unusable X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Apr 2005 08:56:39 -0000 Mike Harding wrote: > On a 5.4-pre system as of the last few days, If I mount a spun down hard > disk (one I am using only for backup): This does not answer your question, but may help you solve the problem. Try detaching the disk after you are done using it, and attaching it again before you mount it. I use this procedure for my backup disk. It has the advantage of allowing me to physically isolate the disk from the computer. The disk lives on a detachable disk drawer-style cabinet; by pulling the disk drawer out an inch I severe the electrical connections between the disk and the computer. The idea is that even if the computer gets electrically fried by lightning, the disk will survive. Thus, the procedure I use is: atacontrol attach 0 mount /backup # Perform backup umount /backup atacontrol detach 0 -- Diomidis Spinellis - http://www.spinellis.gr