From owner-freebsd-questions@freebsd.org Sun Jul 8 00:42:10 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 57ACC10422B4 for ; Sun, 8 Jul 2018 00:42:10 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: from mail-wm0-x22b.google.com (mail-wm0-x22b.google.com [IPv6:2a00:1450:400c:c09::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id C05BF755E1 for ; Sun, 8 Jul 2018 00:42:09 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: by mail-wm0-x22b.google.com with SMTP id s14-v6so17429812wmc.1 for ; Sat, 07 Jul 2018 17:42:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ytO5JDZRlUJjZGkKSbkbe1/j9+pDApeFeNIXY9oEsiY=; b=W7dLaVZSKOyhOF91ZDL1XloGinGgcsAwUJJlS8dvdGUgmwbwAMjJPZKVMuAgGdIzEG UmnLyfYje3aenOyGG0gtQgoAkjmvUxmVwLtTcPZGTmy7fgpRO9PjvyWXtK6jqwDB4Mfp E1frKYy5cFBKPDTa9KyZOpufS828h8tjD9AqCAEZwXu/dhqhwFQ0VM0cH3TKF0Vgi+pt sWCY6vH5bspdUyRLHeNtU9ZH6IVhuDdVfyZo0wA2oNDBXG9r/niNVfHhj48qK3XHHvyB NHkTp3bV0fHPqgGr3tgo7GFfPWtJIm68MnErZSUPFXQnnelNB2s7pbnRm74ohEXizJjS u6Ug== X-Gm-Message-State: APt69E1V5lf6hPDmvycXkGmNGbvOcdYVQXEmzWSi/IwCRwiSVn2UZFJ7 qdclgwEBemfw9QkcuurFlJ553g== X-Google-Smtp-Source: AAOMgpe9iopKKKrC105HmNF9bDUzjeOEPd4VuhIOOTvYlem47t3wvL4ENQQKPEuy3SkXWiWQrMOpuA== X-Received: by 2002:a1c:9c0b:: with SMTP id f11-v6mr9208872wme.148.1531010528318; Sat, 07 Jul 2018 17:42:08 -0700 (PDT) Received: from gumby.homeunix.com ([2.222.27.178]) by smtp.gmail.com with ESMTPSA id z193-v6sm16210604wmc.14.2018.07.07.17.42.07 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 07 Jul 2018 17:42:07 -0700 (PDT) Date: Sun, 8 Jul 2018 01:42:06 +0100 From: RW To: freebsd-questions@freebsd.org Subject: Re: A request for unnested UFS implementation in MBR Message-ID: <20180708014206.24a268a6@gumby.homeunix.com> In-Reply-To: <20180708014204.57b34879.freebsd@edvax.de> References: <98201d37-2d65-34c6-969e-c9649f1a3ab1@yandex.com> <20180707224648.5187be22@gumby.homeunix.com> <0753eec0-674f-842f-2dae-c8405b004dc1@yandex.com> <20180708000437.2dd95933@gumby.homeunix.com> <20180708014204.57b34879.freebsd@edvax.de> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; amd64-portbld-freebsd11.1) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Jul 2018 00:42:10 -0000 On Sun, 8 Jul 2018 01:42:04 +0200 Polytropon wrote: > From my understanding (and explained off-list), FreeBSD > requires a 'a' BSD-labeled partition (inside a slice in > case of MBR, or on a disk if "dedicated") to boot from. > It doesn't seem to be possible to label a partition 'a' > without using labels. > > The label 'c' for data partitions is implicit and will > be synonymous for "the whole thing" (slice, disk), as > it is generated by using newfs on a MBR slice directly > (no matter if "DOS primary partition" or "logical volume > inside DOS extended partition"). It's certainly possible to put UFS on a disk, or an MBR partition, without labelling. I don't recall seeing a 'c' but I might be wrong.