From owner-freebsd-hardware Thu Oct 23 19:57:58 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id TAA15742 for hardware-outgoing; Thu, 23 Oct 1997 19:57:58 -0700 (PDT) (envelope-from owner-freebsd-hardware) Received: from word.smith.net.au (word.smith.net.au [202.0.75.3]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id TAA15737 for ; Thu, 23 Oct 1997 19:57:51 -0700 (PDT) (envelope-from mike@word.smith.net.au) Received: from word.smith.net.au (localhost.smith.net.au [127.0.0.1]) by word.smith.net.au (8.8.7/8.8.5) with ESMTP id MAA00645; Fri, 24 Oct 1997 12:24:32 +0930 (CST) Message-Id: <199710240254.MAA00645@word.smith.net.au> X-Mailer: exmh version 2.0zeta 7/24/97 To: Michael Knoll cc: hardware@freebsd.org Subject: Re: Harddrive powerdowns In-reply-to: Your message of "Thu, 23 Oct 1997 16:36:08 -0400." <3.0.32.19971023163503.00a6e330@lafcol.lafayette.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 24 Oct 1997 12:24:31 +0930 From: Mike Smith Sender: owner-freebsd-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > I have an IDE harddrive in a FreeBSD machine, and would like to enable > power down for it. In the BIOS I can set the time, and it will power down > when in BSD, but, when I use the HD, causing the HD to spin up, I get one > or two interrupt time outs on the wd0 device. That's normal. > Is this safe? Will these timeouts ever cause corruption? Only if the drive takes longer to spin up than the FreeBSD driver is willing to wait. In your case, it looks like it'll be OK. > Can FreeBSD it's > power down the HD, and recognize the HD is down, and wait longer for > spinning up? What is the best solution to get my HD to spin down? The approach you're using now looks like it works. FreeBSD doesn't support any of the 'power-saving' drive features, being more concerned with performance. mike