Date: Tue, 25 Dec 2001 20:46:22 -0700 From: "Chad R. Larson" <chad@DCFinc.com> To: Wilko Bulte <wkb@freebie.xs4all.nl> Cc: Chris Wilmes <cwilmes@creighton.edu>, damien@carroll.com, freebsd-questions@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG Subject: Re: Sharing a SCSI bus with 2 controllers Message-ID: <20011225204622.B29819@freeway.dcfinc.com> In-Reply-To: <20011221114829.E23547@freebie.xs4all.nl>; from wkb@freebie.xs4all.nl on Fri, Dec 21, 2001 at 11:48:29AM %2B0100 References: <55670000.1008866988@50.dhcp.hck.carroll.com> <Pine.HPX.4.05.10112201708290.29607-100000@bluejay.creighton.edu> <20011221114829.E23547@freebie.xs4all.nl>
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On Fri, Dec 21, 2001 at 11:48:29AM +0100, Wilko Bulte wrote: > On Thu, Dec 20, 2001 at 05:24:52PM -0600, Chris Wilmes wrote: >> On Thu, 20 Dec 2001 damien@carroll.com wrote: >> >>> Is it possible to share a SCSI device with two different >>> controllers? I have a tape backup that I want to share with >>> two systems, and I want them to be both connected at the same >>> time. I have connected both controllers to the tape backup, >>> made sure that they were configured as different device >>> numbers, and re-booted both systems. One is a Windows >>> Machine, the other is a BSD box. Both of the controllers are >>> the same (Adaptec 29160N) The BSD box is complaining about >>> seeing SCSI bus resets on the bus: >>> >>> ahc0: Someone reset channel A >>> >>> What is the correct way to do this (if it is at all >>> possible)? Are there special kernel or hardware settings >>> required for this to work properly? On our Pyramids, we had a kernel build option to support "dual hosting". It did two things. The first was to suppress "spurious interrupt" messages when one machine was doing SCSI bus resets during its bootup probes. The other was for the driver(s) to restart any I/O that was stopped by a reset from the other end, without complaint. Sounds like a useful feature for us FreeBSD'rs too. -crl -- Chad R. Larson (CRL15) 602-953-1392 Brother, can you paradigm? chad@dcfinc.com chad@larsons.org larson1@home.com DCF, Inc. - 14623 North 49th Place, Scottsdale, Arizona 85254-2207 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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