Date: Sat, 23 Nov 1996 08:56:01 -0800 (PST) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: msmith@atrad.adelaide.edu.au (Michael Smith) Cc: fenner@parc.xerox.com, freebsd-current@freebsd.org, jkh@freebsd.org, phk@freebsd.org Subject: Re: 2.2-ALPHA install failure Message-ID: <199611231656.IAA17156@GndRsh.aac.dev.com> In-Reply-To: <199611231117.VAA22545@genesis.atrad.adelaide.edu.au> from Michael Smith at "Nov 23, 96 09:47:15 pm"
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> Bill Fenner stands accused of saying: > > decided to install 2.2-ALPHA on it. Although the new install went > > reasonably well, it won't reboot the new disk. I used the "dangerously > > dedicated" mode, so that I wouldn't have to deal with partition tables > > and weird track values and stuff. Woo, was I wrong. The very first > > You are using an NCR controller, or some other SCSI controller that > reads the partition table out of the MBR. The 'dangerously dedicated' > mode won't work with these controllers, as they become _very_ confused > by it. Hummm... that goes contrary to what I have been doing on systems for the last 4 years using NCR controllers. You can use the dangerously dedicated mode on the NCR just fine, and I usually set the drives up this way with a 64/32 translation so that the drive can easily be moved between any of the NCR/Buslogic/Adaptec controllers since they all understand 64/32. The changed behavior in the install programs to do 1/1 translation is what is brain damaged, that causes more grief than I have ever seen, so Rod's Rule when doing a ``dangerously dedicated'' install is to always override the bios geometry with X/64/32, and turn off extended (DOS >1G) translation on adaptec and buslogic cards, the NCR deals with the translation automagically, and in conformance with the SCSI BIOS PnP Spec. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation, Inc. Reliable computers for FreeBSD
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