Date: Tue, 20 Nov 2001 09:38:36 -0700 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: "Jose M. Alcaide" <jose@we.lc.ehu.es> Cc: scsi@FreeBSD.ORG Subject: Re: weird problems with on-board Adaptec 7880 Message-ID: <200111201638.fAKGcbY96331@aslan.scsiguy.com> In-Reply-To: Your message of "Tue, 20 Nov 2001 14:50:37 %2B0100." <20011120145037.A1056@v-ger.we.lc.ehu.es>
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>On Mon, Nov 19, 2001 at 03:08:48PM -0700, Justin T. Gibbs wrote: >> I don't think the syncrate problem is at all related to why the bus does >> not work. The bus doesn't work because termination *on the controller* >> is not set correctly. Your test with the 2940U can't detect all termination >> issues. > >Maybe. I supposed that termination at the controller side was working. >However, if termination on the controller is always on, then it should >work when there are devices attached to only one of the two SCSI onboard >connectors. OTOH, if termination is always off, then it should work when >there are terminated device chains attached to both onboard SCSI >connectors... or am I wrong? It really depends on how the MB is wired. Some MBs don't allow any software control of the termination from the aic7xxx chip. Since I haven't used your board, I can't say. >> The dump is only useful with an understanding of the corresponding >> SCSI Select settings. Please go into SCSI select and set the transfer >> rate from fastest to slowest across the SCSI IDs. This will provide >> a better understanding of how this BIOS is setting the SEEPROM. Also >> include the SCSI BIOS version for this controller. > >Well, I did the following tests (logs attached): I'm on my way out of town so I will not be able to look at these until next Monday. In the mean time, can you send me one last log with each of the 16 devices set to a different transfer rate. It is much easier to look at a single dump that shows all possible speeds (highest to lowest), then to piece together 5 different logs that don't cover all of the possible settings. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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