From owner-freebsd-current@FreeBSD.ORG Thu Feb 25 17:58:21 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 995C6106564A; Thu, 25 Feb 2010 17:58:21 +0000 (UTC) (envelope-from behrnetworks@gmail.com) Received: from mail-bw0-f216.google.com (mail-bw0-f216.google.com [209.85.218.216]) by mx1.freebsd.org (Postfix) with ESMTP id F2A528FC15; Thu, 25 Feb 2010 17:58:20 +0000 (UTC) Received: by bwz8 with SMTP id 8so972233bwz.3 for ; Thu, 25 Feb 2010 09:58:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=nEgmg0RZhNxAJs+jKAznhMrZfP4SBwnEzxV3pVPtUYY=; b=rQAtIX0jhaNqR1lcvz9OzWRcbC6SFkbif91kp+TjENjXawa3w8jm6EpzmHf6YzpOHF UP9fZQGF9esEIagUCrT2BRpI2QMaBFSfDtyqK8bayS0QqjBZYY9+RB2uLpiLG4bdttmC DxFt/eZ4MYtnqTwH5qDMlIxcLYSv1982eoZaI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=o/UYdIXdMtLRMKZwTfiVfVobzKvibuNMFZxIsXOlJ8Vn/UnJWdyS3DVLZ3Zy+HFANW nXUNqFuNRCOI9xSEWxNqKoRBIYovz2tsTWuXW7TtXspvas8p6PQd0InrZayKkEVKQW9D D5x5Fjbn8QjhJZ/xyarfe6el/liycCcm1/hXk= MIME-Version: 1.0 Received: by 10.204.34.81 with SMTP id k17mr907888bkd.78.1267120695956; Thu, 25 Feb 2010 09:58:15 -0800 (PST) In-Reply-To: <201002250806.01217.jhb@freebsd.org> References: <64aa03031002161803h667734cal4d668b9eb9c0a1a8@mail.gmail.com> <64aa03031002241912t396b3001ub89fec82a020f891@mail.gmail.com> <201002250806.01217.jhb@freebsd.org> Date: Thu, 25 Feb 2010 12:58:13 -0500 Message-ID: <64aa03031002250958m470982c5g59735f9cef88af78@mail.gmail.com> From: Chris To: John Baldwin Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Scot Hetzel , freebsd-current@freebsd.org, Pegasus Mc Cleaft , Matt Reimer Subject: Re: Seeing the dreaded "ZFS: i/o error - all block copies unavailable" on 9.0-CURRENT X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Feb 2010 17:58:21 -0000 On Thu, Feb 25, 2010 at 8:06 AM, John Baldwin wrote: > On Wednesday 24 February 2010 10:12:25 pm Chris wrote: >> So it sounds like somehow my system is trying to use the old boot2 >> method when I don't hit F12. I'm guessing the difference is due to how >> the hard drive is getting presented to the boot loader by the BIOS. >> How can I get rid of the legacy boot system and use only the ZFS >> bootloader? > > Does F12 enable PXE booting or some such? The only options I have when I press F12 are to either boot from my hard drive or to boot from my optical drive. Is there any way to more verbosely see what is happening at the bootloader level? >I can't really tell from your e-mails exactly what the difference in the t= wo cases are. =A0The BIOS doesn't > really tell the boot code much of anything. =A0It just loads the first se= ctor of > the disk into RAM at 0x7c00, puts the BIOS drive number (typically 0x80) = into > the %dl register, and starts executing the code it just loaded. =A0Unless > hitting F12 is somehow booting from a different physical drive (and thus > either loading different boot code or passing a different value of %dl to > another copy of the same boot code), it shouldn't make any difference. > > -- > John Baldwin >