Date: Sat, 14 Oct 1995 07:50:58 -0700 (PDT) From: bmk@dtr.com To: brian@MediaCity.com (Brian Litzinger) Cc: questions@freebsd.org Subject: Re: Buslogic 445 async only? Message-ID: <199510141450.HAA00526@everest> In-Reply-To: <199510140012.RAA17659@MediaCity.com> from "Brian Litzinger" at Oct 13, 95 05:12:01 pm
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> > > > This has been a problem for quite awhile - and I'd like to get it > > resolved now that I have time to look into it. > > > > I have a 486 machine (VL) with a Buslogic 445S and a variety of SCSI-I > > and -II disks installed. On bootup, the kernel reports that the board > > is set for async mode. I don't see anywhere in the docs where this can > > be disabled/enabled. From reading the source, I have learned that the > > bt driver only uses what the controller tells it, so it's gotta be an > > issue with the controller. > > > > Any ideas? I'd really like to get this thing working in sync mode. > > > Does the 445S support FAST? Yes. > I may be miss remembering this, but I seem to remember from somewhere > (possibly the SCSI spec from ANSI) that FAST mode will only be negotiated > if all the devices on the BUS are SCSI 2. (on the other hand, it might > have just been one of those reliability things) Dunno, but that's easy to verify since the SCSI-1 devices in this system aren't required to boot the system. After looking at the docs more carefully, I see that the default operation is async. I'm going to take a peek inside and see what's up. > So you might want to consider that when you are trying to squeeze out > extra performance. > Brian Litzinger > brian@mediacity.com
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