From owner-svn-src-all@FreeBSD.ORG Sun Oct 24 16:35:36 2010 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 43CA9106566C; Sun, 24 Oct 2010 16:35:36 +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 D06038FC0C; Sun, 24 Oct 2010 16:35:35 +0000 (UTC) Received: from muon.cran.org.uk (localhost [127.0.0.1]) by muon.cran.org.uk (Postfix) with ESMTP id 11E6AE7F6E; Sun, 24 Oct 2010 17:35:35 +0100 (BST) Received: from core.nessbank (client-81-107-142-135.midd.adsl.virginmedia.com [81.107.142.135]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA; Sun, 24 Oct 2010 17:35:34 +0100 (BST) From: Bruce Cran To: src-committers@freebsd.org Date: Sun, 24 Oct 2010 17:35:32 +0100 User-Agent: KMail/1.13.5 (FreeBSD/9.0-CURRENT; KDE/4.5.1; amd64; ; ) References: <201010241631.o9OGVw1C033817@svn.freebsd.org> In-Reply-To: <201010241631.o9OGVw1C033817@svn.freebsd.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201010241735.32876.bruce@cran.org.uk> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org Subject: Re: svn commit: r214279 - in head: share/man/man4 sys/cam sys/cam/ata sys/kern X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 24 Oct 2010 16:35:36 -0000 On Sunday 24 October 2010 17:31:58 Bruce Cran wrote: > Log: > Mostly revert r203420, and add similar functionality into ada(4) since > the existing code caused problems with some SCSI controllers. > > A new sysctl kern.cam.ada.spindown_shutdown has been added that controls > whether or not to spin-down disks when shutting down. > Spinning down the disks unloads/parks the heads - this is > much better than removing power when the disk is still > spinning because otherwise an Emergency Unload occurs which may cause > damage to the actuator. The FLUSH CACHE + STANDBY IMMEDIATE commands are issued (instead of just SLEEP) following the procedure documented in Fujitsu's MHW series product documentation under section 1.10.1, "Recommended power-off sequence". -- Bruce Cran