Date: Wed, 31 Mar 1999 13:35:38 -0700 From: "Justin T. Gibbs" <gibbs@plutotech.com> To: graaf@iae.nl Cc: gibbs@plutotech.com, admin@iae.nl, scsi@FreeBSD.org Subject: Re: CAM timeout in dataout phase (3.1-STABLE) Message-ID: <199903312044.NAA18087@pluto.plutotech.com> In-Reply-To: Your message of "Wed, 31 Mar 1999 22:35:57 %2B0200." <19990331211914.179CFD98A@server.cirdan.iae.nl>
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>Hi Justin, > >On 31 Mar, Justin T. Gibbs wrote: >> The motherboard has only one bus on it. The termination settings for >> the controller should be "High Byte Termination Enabled", and "Low >> Byte Termination Disabled". It may be that your motherboard always >> terminates the high byte, but perhaps not. Active terminators may not >> be sufficient for the load you are putting on this system. > >If active terminators are not sufficient, what would solve the problem? Forced Perfect Terminators. See www.scsi-cables.com for details. >Would it help if we put the boot disk on a separate SCSI controller, >thus shortening the total length of the SCSI bus? Or is a different >kind of terminator better in this case? Your bus length may be too long even if you upgrade your terminators. Moving the boot disk may help things. You could also try reducing the negotiated transfer speed to verify that cabling is your problem. Your configuration will likely work at 16 or 13MHz. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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