From owner-freebsd-scsi Mon Apr 30 15:13:35 2001 Delivered-To: freebsd-scsi@freebsd.org Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (Postfix) with ESMTP id 87D9437B424 for ; Mon, 30 Apr 2001 15:13:31 -0700 (PDT) (envelope-from j@uriah.heep.sax.de) Received: (from uucp@localhost) by sax.sax.de (8.9.3/8.9.3) with UUCP id AAA16176; Tue, 1 May 2001 00:13:30 +0200 (CEST) Received: (from j@localhost) by uriah.heep.sax.de (8.11.3/8.11.3) id f3UMCYU67449; Tue, 1 May 2001 00:12:34 +0200 (MET DST) (envelope-from j) Date: Tue, 1 May 2001 00:12:34 +0200 (MET DST) Message-Id: <200104302212.f3UMCYU67449@uriah.heep.sax.de> Mime-Version: 1.0 X-Newsreader: knews 1.0b.1 Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Organization: Private BSD site, Dresden X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E References: <01043013530600.00636@pablo.johnrshannon.com> From: j@uriah.heep.sax.de (J Wunsch) Subject: Re: Disk geomerty X-Original-Newsgroups: local.freebsd.scsi To: freebsd-scsi@freebsd.org Cc: "John R. Shannon" Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org "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. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message