Date: Fri, 14 Aug 1998 12:46:31 -0600 (MDT) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: Matti Aarnio <matti.aarnio@sonera.fi> Cc: aic7xxx@FreeBSD.ORG Subject: Re: AHA2790UW has speed-limit problems ? Message-ID: <199808141846.MAA03259@narnia.plutotech.com> In-Reply-To: <19980814141956Z92206-32591%2B1@mea.tmt.tele.fi>
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> Four Ultra-Wide (SingleEnded) disks on high quality cable inside > DEC PWS 433a workstation chassis attached to AHA2940UW host adapter. How long is this cable. How far apart are the connectors in the chain. Have you tried using a "forced perfect" terminator? > The Kludge-Cure: > > Lower the speed of the device in the adapter bios configuration > utility. In fact lower them all, and no SCSI-timeout problems appear. This would indicate bus signal quatlity problems at high speeds. > Question: > > Is there ANYTHING that is possible to do to in this type of environment > so that I could (reliably) run faster disk-transfer speeds ? Shorten the cables. Ensure that the distance between all connectors on the cable are equal. Use a forced perfect terminator. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe aic7xxx" in the body of the message
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