Date: Tue, 11 Feb 1997 12:13:13 -0800 From: Craig Shaver <craig@progroup.com> To: Stefan Esser <se@freebsd.org> Cc: scsi@freebsd.org Subject: Re: ncr in stable ... 875 Message-ID: <3300D2D9.3F54BC7E@progroup.com> 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>
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Stefan Esser 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. > > 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. > > > On another note, will I be able to boot using the GENERIC kernel > > against the Tekram controller? I am under the impression the base > > driver will recognize the controller as an 825. > > 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 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. > > But I got reports of the "generic" NCR driver > giving significantly better throughput anyway, > and I guess I know why this is the case :) > > Regards, STefan Sounds good, thanks for the information and help... -- Craig Shaver (craig@progroup.com) (415)390-0654 Productivity Group POB 60458 Sunnyvale, CA 94088
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