From owner-freebsd-hackers@FreeBSD.ORG Tue Aug 17 17:07:59 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C49D316A4CE for ; Tue, 17 Aug 2004 17:07:59 +0000 (GMT) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by mx1.FreeBSD.org (Postfix) with ESMTP id 661BE43D49 for ; Tue, 17 Aug 2004 17:07:55 +0000 (GMT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.12.11/8.12.11) id i7HH7taj034626 for freebsd-hackers@freebsd.org; Tue, 17 Aug 2004 12:07:55 -0500 (CDT) (envelope-from dan) Date: Tue, 17 Aug 2004 12:07:54 -0500 From: Dan Nelson To: freebsd-hackers@freebsd.org Message-ID: <20040817170754.GE53307@dan.emsphone.com> References: <20040817185240.A5554@oasis.uptsoft.com> <20040817161516.GB53307@dan.emsphone.com> <20040817192552.B5554@oasis.uptsoft.com> <20040817163915.GC53307@dan.emsphone.com> <20040817195414.D5554@oasis.uptsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040817195414.D5554@oasis.uptsoft.com> X-OS: FreeBSD 5.2-CURRENT X-message-flag: Outlook Error User-Agent: Mutt/1.5.6i Subject: Re: actual boot device X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Aug 2004 17:07:59 -0000 In the last episode (Aug 17), Sergey Lyubka said: > > The best you can do is search your mountpoints and see whether any of > > them has a "/kernel" file. The bootblock (and loader) uses the BIOS to > > read the kernel file, so it's possible that the device may not even be > > accessible from the running system. If, for example, you booted off a > > floppy but didn't have the floppy drivers in the kernel. > > Yes, that makes sense, the boot device may not be even accessible. > As I said, I am running picobsd-like system, it's / embedded into kernel > so / mountpoint is /dev/md0 :-) What might work is reading the first 512 bytes of /dev/{da0,ad0,fd0,cd0} and see if any of them have your picobsd bootblock. Then you know where the filessytem holding /kernel is and can mount it yourself. -- Dan Nelson dnelson@allantgroup.com