Date: Fri, 24 Jul 1998 20:40:57 -0700 From: Chris Pirih <proverbs@wolfenet.com> To: aic7xxx Mailing List <AIC7xxx@FreeBSD.ORG> Subject: Re: Dell 410 Workstations and Asus Motherboard systems Message-ID: <3.0.5.32.19980724204057.00824880@popserv.wolfenet.com> In-Reply-To: <Pine.LNX.3.96.980723103237.13786M-100000@ganesh.phy.duke.e du> References: <Pine.LNX.4.02.9807221915290.7516-100000@osiris.ml.org>
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At 10:34 AM 07/23/1998 -0400, Robert G. Brown wrote: >On Wed, 22 Jul 1998, Brian Ristuccia wrote: >> On Wed, 22 Jul 1998, Robert G. Brown wrote: >> > The only options I see in the BIOS are to either enable or disable >> > termination on the controller. Given that it is a single ended >> > controller, I'm not sure why they have the disable option (so somebody >> > can "break" their system?;-). >> >> Sometimes the HA will be in the middle of the ribbon: >> >> <|-----------|-----------|--------|----------------|> >> terminator drive host drive terminator >> pack adaptor pack > >Ah, you mean that they have a ribbon that plugs into the single >connector in the middle, but has two ends? Never seen or used such a >beast, but that very well may be it. "Single-ended" does not mean that the adapter only has a cable going out from it in one direction. It means that of each pair of bus lines, one is signal and one is ground. This is as opposed to "differential" which uses positive/negative pairs of lines to carry signals. Or something like that. As someone else said, you can plug any of the connectors of a regular SCSI cable into the adapter, assuming the termination options allow it. (I.e., end of cable -> terminated; middle of cable -> unterminated.) --- chris To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe aic7xxx" in the body of the message
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