From owner-freebsd-questions@FreeBSD.ORG Wed Mar 11 18:10:48 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4877510656BD for ; Wed, 11 Mar 2009 18:10:48 +0000 (UTC) (envelope-from dan-freebsd-questions@ourbrains.org) Received: from ourbrains.org (li48-221.members.linode.com [66.246.76.221]) by mx1.freebsd.org (Postfix) with SMTP id 104EA8FC1E for ; Wed, 11 Mar 2009 18:10:47 +0000 (UTC) (envelope-from dan-freebsd-questions@ourbrains.org) Received: (qmail 26890 invoked by uid 1000); 11 Mar 2009 18:11:07 -0000 Date: Wed, 11 Mar 2009 14:11:07 -0400 From: Dan To: freebsd-questions@freebsd.org Message-ID: <20090311181107.GA26852@ourbrains.org> Mail-Followup-To: freebsd-questions@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Subject: Disabling write cache on eSATA enclosures X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Mar 2009 18:10:49 -0000 Hi. atacontrol is reporting that the write cache on an eSATA enclosure I am using (Silicon Image chipset) with Silicon Image SATA controller has write cache enabled even though I want it disabled in loader.conf. My feeling is this has to be controlled by the enclosure, though such control doesn't exist. Is this it, or is the OS still responsible for turning off cache on external drives? What's your experience? Thanks.