From owner-freebsd-current Wed Sep 16 19:36:23 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id TAA17655 for freebsd-current-outgoing; Wed, 16 Sep 1998 19:36:23 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from mail.clintondale.com (boris.clintondale.com [206.88.120.67]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id TAA17601 for ; Wed, 16 Sep 1998 19:36:14 -0700 (PDT) (envelope-from matt@clintondale.com) Received: from matt (helo=localhost) by mail.clintondale.com with local-smtp (Exim 2.02 #2) id 0zJTv4-0002VW-00 for current@freebsd.org; Wed, 16 Sep 1998 22:35:42 -0400 Date: Wed, 16 Sep 1998 22:35:42 -0400 (EDT) From: Matt Hamilton To: current@FreeBSD.ORG Subject: SCSI spindowns and CAM Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Dear All, I've been meaning to ask this for a while,a nd I wonder if now anything has changed with CAM being introduced: Is it possible to spin down SCSI disks when not in use? Somehow send them a STOP command after a certain amount of inactivity? Or trigger it from APM or something? My old IDE disks used to spin down after inactivity via a bios setting, and I seem to remember FreeBSD had no problems with this. For the record my controller is an onboard AIC7880 and I'm running -current with CAM (aout) Also I get this: da0 at ahc0 bus 0 target 1 lun 0 da0: Fixed Direct Access SCSI2 device da0: 10.0MB/s transfers (10.0MHz, offset 15), Tagged Queueing Enabled da0: 2150MB (4404489 512 byte sectors: 255H 63S/T 274C) da1 at ahc0 bus 0 target 2 lun 0 da1: Fixed Direct Access SCSI2 device da1: 10.0MB/s transfers (10.0MHz, offset 15), Tagged Queueing Enabled da1: 2150MB (4404489 512 byte sectors: 255H 63S/T 274C) Both the drives are WIDE SCSI-II and I thought they are meant to run at 20MB/s (I have 20Mb/s set in my Adaptec BIOS)? I haven't had them very long and so I'm not sure if they were indeed running 20MB/s before CAM was introduced. Any insight? -Matt ------------------------------------------------------------------------------- Matt Hamilton Clintondale Aviation matt@clintondale.com http://www.clintondale.com ------------------------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message