From owner-freebsd-hackers Thu Jun 15 20:44:08 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id UAA11122 for hackers-outgoing; Thu, 15 Jun 1995 20:44:08 -0700 Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.34]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id UAA11068 for ; Thu, 15 Jun 1995 20:43:59 -0700 Received: (from bde@localhost) by godzilla.zeta.org.au (8.6.9/8.6.9) id NAA05064; Fri, 16 Jun 1995 13:38:57 +1000 Date: Fri, 16 Jun 1995 13:38:57 +1000 From: Bruce Evans Message-Id: <199506160338.NAA05064@godzilla.zeta.org.au> To: rashid@haven.ios.com, rgrimes@gndrsh.aac.dev.com Subject: Re: HD Geometry dirty trick Cc: hackers@freebsd.org Sender: hackers-owner@freebsd.org Precedence: bulk >> I've found that using "basic" geometry of 1023/64/32 >> for SCSI HD with 1Gb capacity and just adjusting the first >> value for other capacities , one can get painless install . >> Foe example , if you install 4Gb HDD - we multiply 1023 by 4 >> and use 4092/64/32 Geometry. >> For 300Mb SCSI disk we use (Int(1023/3.3))/64/32 and so on. >Fine for Adaptec controllers, not so fine for NCR controllers that >like to tranlate >1G drives to xxxx/62/34, yes that is right 62/34! I.e., 64/32 geometry works if it was the correct (BIOS) geometry all along. Otherwise, it is unlikely to work. Bruce