From owner-freebsd-scsi Tue May 1 7:59:55 2001 Delivered-To: freebsd-scsi@freebsd.org Received: from mail.johnrshannon.com (mail.johnrshannon.com [208.141.183.125]) by hub.freebsd.org (Postfix) with ESMTP id 3757E37B423 for ; Tue, 1 May 2001 07:59:53 -0700 (PDT) (envelope-from john@johnrshannon.com) Received: from pablo.johnrshannon.com (pablo.johnrshannon.com [192.168.1.3]) by mail.johnrshannon.com (Postfix) with ESMTP id C0AF41D881 for ; Tue, 1 May 2001 08:59:51 -0600 (MDT) Received: (from john@localhost) by pablo.johnrshannon.com (8.11.3/8.11.3) id f41ExpE00649 for freebsd-scsi@freebsd.org; Tue, 1 May 2001 08:59:51 -0600 (MDT) (envelope-from john) Content-Type: text/plain; charset="iso-8859-1" From: "John R. Shannon" Reply-To: john@johnrshannon.com Organization: johnrshannon.com To: freebsd-scsi@freebsd.org Subject: Re: Disk geomerty Date: Tue, 1 May 2001 08:59:51 -0600 X-Mailer: KMail [version 1.2] References: <01043013530600.00636@pablo.johnrshannon.com> <200104302212.f3UMCYU67449@uriah.heep.sax.de> In-Reply-To: <200104302212.f3UMCYU67449@uriah.heep.sax.de> MIME-Version: 1.0 Message-Id: <01050108595100.00646@pablo.johnrshannon.com> Content-Transfer-Encoding: 8bit Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I'm still having problems. When I set the disk 9318/64/32 with fdisk, FreeBSD installs but will not boot. Fiddling with the SCSI BIOS settings has no effect; the BIOS reports 1025/255/63. I can fdisk the geometry to 1024/255/63, install and boot. The only problem is that the only 8.475 GB is used on a 9.1 GB drive. On Monday 30 April 2001 04:12 pm, you wrote: > "John R. Shannon" wrote: > > The diskcontroller offers options for CHS mapping of "Plug and Play > > Mapping" or "Alternate CHS Mapping" without explanation. The FAQ > > refers to "extended translation support". Does this correspond to > > one of these modes? > > No idea what they really mean. Anyway, based on my own experience the > Tekrams are rather forgiving and don't stupidly insist on a particular > mapping. The worst that happens (like it could be for `dangerously > dedicated' mode) is that they warn you about a supposedly bad fdisk > table, and pause for 10 seconds at boot time. While the message then > says `Hit any key to continue', they actually even continue > automatically after 10 seconds. > > If you are cautious, just give one of those modes a try with a minimal > installation. If it's not what you like, after installation blank out > the first sectors of your disk with > > dd if=/dev/zero of=/dev/da0 count=100 > > and then immediately reboot and reinstall using the alternative > option. The above command will fake a `virgin' disk to the controller > BIOS, so they can't try to adapt to a previously installed fdisk > table, and have to restart from scratch. -- John R. Shannon john@johnrshannon.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message