Date: Wed, 16 Sep 1998 22:35:42 -0400 (EDT) From: Matt Hamilton <matt@clintondale.com> To: current@FreeBSD.ORG Subject: SCSI spindowns and CAM Message-ID: <Pine.BSF.3.96.980916222947.9619B-100000@boris.clintondale.com>
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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: <IBM DFHSS2W 1717> 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: <IBM DFHSS2W 4G4G> 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
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