From owner-freebsd-questions Thu Jul 13 21: 2:20 2000 Delivered-To: freebsd-questions@freebsd.org Received: from pike.osd.bsdi.com (pike.osd.bsdi.com [204.216.28.222]) by hub.freebsd.org (Postfix) with ESMTP id 764EB37BE3E for ; Thu, 13 Jul 2000 21:02:17 -0700 (PDT) (envelope-from jhb@foo.osd.bsdi.com) Received: from foo.osd.bsdi.com (root@foo.osd.bsdi.com [204.216.28.137]) by pike.osd.bsdi.com (8.9.3/8.9.3) with ESMTP id VAA96441; Thu, 13 Jul 2000 21:02:05 -0700 (PDT) (envelope-from jhb@foo.osd.bsdi.com) Received: (from jhb@localhost) by foo.osd.bsdi.com (8.9.3/8.9.3) id VAA07918; Thu, 13 Jul 2000 21:01:36 -0700 (PDT) (envelope-from jhb) Message-ID: X-Mailer: XFMail 1.4.0 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <396E5FBB.74C99EC@S1.com> Date: Thu, 13 Jul 2000 21:01:36 -0700 (PDT) Organization: BSD, Inc. From: John Baldwin To: Harry Woodward-Clarke Subject: Re: Anyone resolved "Missing operating system" issue? Cc: freebsd-questions@FreeBSD.ORG Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 14-Jul-00 Harry Woodward-Clarke wrote: > Hi John, > >> >> Eek! Don't use dangerously dedicated on SCSI. It causes SCSI disks >> to break horribly. > > "Please explain?" Some SCSI controllers (most recently newer ones) actually read the MBR from the disk so that they can match the geometry that the MBR thinks the disk has. However, with dangerously dedicated mode we use a completely arbitrary geometry unrelated to the actual disk. (It's hardcoded). This badly confuses some controllers. > haxxa -- John Baldwin -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.cslab.vt.edu/~jobaldwi/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message