From owner-freebsd-hackers Fri Jun 2 19:42:13 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id TAA14741 for hackers-outgoing; Fri, 2 Jun 1995 19:42:13 -0700 Received: from temptation.interlog.com (temp@temptation.interlog.com [198.53.146.54]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id TAA14731 for ; Fri, 2 Jun 1995 19:42:04 -0700 Received: (from temp@localhost) by temptation.interlog.com (8.6.9/8.6.9) id WAA16827; Fri, 2 Jun 1995 22:40:40 -0400 Date: Fri, 2 Jun 1995 22:40:40 -0400 From: Temptation Subject: Re: Can't boot a new 2.0.5A system To: "Rodney W. Grimes" cc: Fred Cawthorne , FreeBSD hackers In-Reply-To: <199506030152.SAA08914@gndrsh.aac.dev.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: hackers-owner@FreeBSD.Org Precedence: bulk On Fri, 2 Jun 1995, Rodney W. Grimes wrote: > > > > > > > > > > > > > > > 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! it's not just Manufactures, I can't move a hard drive from 1542CF -> 1742 -> 2742t/2940/2842 (adaptec) 1gig to 4gig, Maxtor/Seagate/Quatum/Fuj/Toshiba and thats with all the cards being set up the same.