Date: Mon, 11 Mar 1996 12:36:39 -0800 (PST) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: gibbs@freefall.freebsd.org (Justin T. Gibbs) Cc: se@ZPR.Uni-Koeln.DE, questions@freebsd.org Subject: Re: NCR disk controller, hp disk Message-ID: <199603112036.MAA12787@GndRsh.aac.dev.com> In-Reply-To: <199603110006.QAA01321@freefall.freebsd.org> from "Justin T. Gibbs" at Mar 10, 96 04:06:26 pm
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> > >On Mar 8, 23:18, "Rodney W. Grimes" wrote: > >} Subject: Re: NCR disk controller, hp disk > > > >} We really need a SCSI expect to go rewrite the firmware for the NCR cards, > >} what we have today has so many incompatibility problems it is getting hard > >} to spec systes using it :-(. > > > >Rod, > > > >this is plain untrue and you ought to know it ... > > I think we should spend more of our time working to solve the problems > in the system than disparaging FreeBSD's contributors. Perhaps the I agree, and what I said above was in no way meant to be any form of attack on any person, it was a simple statement of my opinion that the NCR firmware is in desperate need of a rewrite. What basis do I have for saying this. Well, the NCR provided loadable firmware with SCSICAM does not have the problems that I am seeing from the FreeBSD firmware, thus it is possible to make the NCR work with a chinnon in sync mode, thus it is a FreeBSD firmware/driver bug. > NCR driver has bugs. Well, so does the aic7xxx driver. Anyway you > slice it, writing SCSI adapter firmware isn't easy. My only complaint > about the NCR driver is that the format of the script is very difficult > for an "outsider" to interpret which makes it hard for me to > lend a hand in fixing bugs. Agreed. It is also very hard for a person that has learned the NCR compiler to try and and use the current tool in FreeBSD due to the disparity between the two. > Most of what I've learned in doing the > aic7xxx driver is directly applicable to any SCSI controller, and > many of the problems with one of the two drivers have been reproducible > in the other during different times in their development cycles. > One thing I'd like to know is if the two problems that were listed > here (the Chinon sync problem, and the HP drive doing tagged queuing) > are reproducible in the aic7xxx driver. The chinnon drives work fine in sync mode with the aic7xxx driver, and have for a long long time. The HP C3725S is working fine with the aic7xxx driver as of 3 weeks ago, and on a March 9 build of -stable, are tags on or off by default in -stable for the aic7xxx driver as I am running GENERIC kernels and have not tweeked anything? -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
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