Date: Fri, 2 Jun 1995 18:52:48 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: fcawth@squid.umd.edu (Fred Cawthorne) Cc: FreeBSD-hackers@FreeBSD.Org (FreeBSD hackers) Subject: Re: Can't boot a new 2.0.5A system Message-ID: <199506030152.SAA08914@gndrsh.aac.dev.com> In-Reply-To: <9506021700.AA22388@squid.umd.edu> from "Fred Cawthorne" at Jun 2, 95 01:00:07 pm
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> > > > > > > > > > > Geometry correct? > > > > > > > > Hmmmm... I thought one of the reasons why I bought a SCSI drive > > > > was to avoid worrying about stuff like geometry and cylinder > > > > translations and what not. At least I never had to worry about it on > > > > any other computer with a SCSI disk until now. The older installers > > > > guessed it correctly, so I didn't touch the settings on this one. > > > > > > > > When in doubt freebsd looks to see what DOS did, so it you have a DOS > > partition, it'll use those geometry figures.. > > > > by definition then at least the BIOS and FreeBSD will match.. > > > The new install got the wrong geometry even when I had FreeBSD 2.0 on > the entire disk... Perhaps there was a problem with the stuff that > an old fdisk created??? I don't remember if I ever installed with an NCR > controller before. (I used to have an Adaptec 1542CF on here...) > So, maybe my NCR scsi bios is messing things up??? > Are you guys sure that the user setting of the geometry thing (i.e. G in > the fdisk screen) is working properly?? BIG CAUTION. The NCR controller does not always use the 32 sector 64 head translation that the adaptec does. I have found that the NCR is using 34 head 62 sector geometries on the 1 G drives I am using and not sure on the 535MB since I have not installed DOS on one of them to see. Be very carefull when trying to move from one controller to another, translation schemes vary between manufactures! -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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