Date: Fri, 29 Sep 1995 07:46:16 +0100 (MET) From: Andreas Klemm <andreas@knobel.gun.de> To: rgrimes@GndRsh.aac.dev.com (Rodney W. Grimes) Cc: davidg@Root.COM, stable@freebsd.org Subject: Re: make world on FreeBSD-stable impossible. cc1: ... signal 11 Message-ID: <199509290646.HAA14254@knobel.gun.de> In-Reply-To: <199509282326.QAA06048@GndRsh.aac.dev.com> from "Rodney W. Grimes" at Sep 28, 95 04:26:01 pm
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> > > > >Instead of ( int something there was a ( xnt something > > > > > > > > Did the above control character munge happen to be on a system with > > > a wide 2940 in it??? If so turn off wide or drop the sync negotiation > > > rate to 5Mhz in scsi-select. There is a bug in the 2940W sequencer code > > > known to cause data corruption when running wide drives at this time. > > > > In this case it was the P90 CPU that caused that mess. I clocked it > > down to 75 MHz, since then no trouble. 2 make worlds ran perfectly. > > > > My hardware: AHA 2940 (not wide), Quantum Grand Prix, ASUS P55TP4XE, > > 256k burst cache, 32 MB 70ns,.... > ^^^^^^^^^^^^^^^^^^ > If you have to clock it down to work at 75MHz I highly suspect you have > a defective cache module. :-( I also see 70nS memory in there, that is > only good to 90Mhz, and it _must_ meet the 70nS t(RAC) timeing or it will > cause problems, even 71nS is enough to cause you problems at 90Mhz, 61nS > causes problems at 100Mhz. Oh .... Then an additional question ... When CPU prices are falling I want to buy one of the 133 or 150 MHz CPU's that will have additionally a better or larger internal cache. What kind of memory would I need to buy, when I wand to drive a 120,133 or 150 MHz CPU ???? Do I have to use EDO RAM then ???? Or do I have to slow down BIOS settings ??? There is an auto detection area in the BIOS. Does it automatically switch to a slower rate, if I use RAM, that is a bit too slow ? These are things I dunno and where I don't know anything by hearsay. Would be fine, if someone could explain that to me. > I now use high quality life time warrantied memory in all of my systems > because I was seeing memory related problems and after running some of it > on a real simm tester and seeing slightly over spec T(RAC) times I decided > it was time to do the right things. Never heard of such a beast. What I know are memory modules, that have parity on it. But since everybody told me, that the triton chipset doesn't support parity checking (what seems to be true, if I look into the BIOS) then I'd know more about this high quality lifetime RAM. How much $ is it more expensive compared to traditional RAM without parity ??? > I am glad it works, I am sad about what you had to do to make it work > as it indicates a timing related problem in some piece of hardware :-(. Puh ... I tried everything ... FreeBSD - Linux ... installed several times ... The very first time I had termination problems, you remember ? I had to learn, that the Toshiba 3601 seems to have bad terminators, I have know no problems with SCSI bus at 10MB/sec, since I put the drive at the end of the SCSI bus ... Puh, lot of work ... my SS2 ran more perfectly but on the other hand much slower ;-) Ok, now I have the multi purpose computer again for DOS, NT (which I need for forthcoming in the company) and FreeBSD.... But seems to me now, that I'm back again in a multi failure hardware world ;-) :-( But I smell it, that soon I'll be through ... With your kind help, thanks again ! Andreas /// -- $$ apsfilter - magic print filter 4lpd @home : andreas@knobel.gun.de $$ ftp://sunsite.unc.edu @work : andreas@sunny.wup.de $$ /pub/Linux/system/Printing/aps-491.tgz knobel: >>> powered by FreeBSD <<<
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