Date: Tue, 11 Feb 1997 21:48:22 +0100 From: se@freebsd.org (Stefan Esser) To: craig@progroup.com (Craig Shaver) Cc: se@freebsd.org (Stefan Esser), scsi@freebsd.org Subject: Re: ncr in stable ... 875 Message-ID: <19970211214822.TV64263@x14.mi.uni-koeln.de> In-Reply-To: <3300D2D9.3F54BC7E@progroup.com>; from Craig Shaver on Feb 11, 1997 12:13:13 -0800 References: <199702072134.NAA29174@vader.cs.berkeley.edu> <199702101012.TAA06339@madoka.hal.t.u-tokyo.ac.jp> <32FF4A6C.2781E494@progroup.com> <19970211183534.ZZ52644@x14.mi.uni-koeln.de> <3300BE5B.59E2B600@progroup.com> <19970211203913.GS05631@x14.mi.uni-koeln.de> <3300D2D9.3F54BC7E@progroup.com>
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On Feb 11, craig@progroup.com (Craig Shaver) wrote: > > You may of course try the Tekram driver. I'd like > > to know how well it works for you. (If you can run > > some benchmarks, I'd love to see the results.) > > I am running the Tekram now, on a 2.1.5R with the Tekram > patches, and a minor patch from you. Would you like me > to run bonnie on it? I have never run bonnie, but can > give it a try. Well, it's only really useful, if you are willing to run the benchmark with both drivers ... > > There might be some minor problems with the Tekram > > driver, which I'd have to check in the sources. > > Ouch! Well I am grateful to the Tekram people for even > putting a FreeBSD driver up in the first place. Even if > your code is better, I would still want to encourage their > future support of FreeBSD. Sure! I really appreciate, that a company cares for the free Unix market, and understands, that even if there are many more Win-3.1 or Win-95 systems than BSD or Linux, most of them will never see a SCSI device from close distance :) > > No, the controller will be fully recognized, but > > many of the new features of the 53c875 will not > > be taken advantage of. (There is no support for > > loading the NCR code into the 875's 4KB SRAM, for > > example, or no negotiation of Ultra-SCSI transfer > > rates.) > > Ok, I gather that it support UW and W devices, but > will not negotiate the setup. Sounds like it should > work out of the box for me. I wanted the GENERIC FreeBSD kernel to support all NCR 53c8xx based SCSI cards at least to the degree required to complete a kernel install. And this has been the case for many months, now. > > I wanted to clean up some of the code before the > > 20MHz speed is enabled, but was held back by some > > other (higher priority) tasks ... > > Is it enabled by default? Will regular wide drives > like the Q Atlas work? I want to use it with a 2G > seagate UW, and 2 4G Atlas drives. They all work now. The driver will only support 10MHz WIDE transfers, i.e. 20MB/s. I could provide you with diffs that make the driver negotiate 20MHz speed, but have not even tested them myself ... I have half-way completed the cleanup of the code, that deals with negotiation values. It will use "abstract" variables, instead of "register bits". Regards, STefan
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