From owner-freebsd-hackers@freebsd.org Mon Jul 30 05:42:49 2018 Return-Path: Delivered-To: freebsd-hackers@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 38730104B1F4 for ; Mon, 30 Jul 2018 05:42:49 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-it0-x233.google.com (mail-it0-x233.google.com [IPv6:2607:f8b0:4001:c0b::233]) (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 BD34F8926D for ; Mon, 30 Jul 2018 05:42:48 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-it0-x233.google.com with SMTP id h20-v6so15211028itf.2 for ; Sun, 29 Jul 2018 22:42:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=5wH472VBXlyhenfPtYDkxSqdxlC3myzHw17yGlc5dQk=; b=imtMkJkWMtLgf93j4ZNh2Sd3uzZcpBp+nWLFi0fKiVi6iKJkryqJbrYpYxks2XIoSm tpWLfV9tKXGHuTyhSvFSZQHia8weaAcQ9gzWBKdBJgYITSfvyGsqM7MSb/ZgWXGXwmva yvAv61fqVFPxULwB8eoqKixvAQ5MKExVpiGTwnbtHG8vd3fWTHLaB9PjCruLHcz1g+Zj y9z0dAzApfkhiXZy+Xnc2lAQIP4DW8W3T9NK6IomlJFWx785TYEV4qLH+g4FOwm8vkxS +RED+1qWHr6w8EGt/6ndxnwG8bqzLqyTS/YliUaHgXEwdK8onX3hr/YH7ueP9NSbrH2F F8sQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=5wH472VBXlyhenfPtYDkxSqdxlC3myzHw17yGlc5dQk=; b=ATSUTHjunArt9cYC7OneSf88SoPDiIBKd85pUo5CkE2TZ1Wivgq54Ilh+R9SCFnGE1 IajaPSwSExh69Ge0nihMSqVGMCcww9yFihImBWDx9uuQZzXoUNcIVnJg3og/XtKZutIQ Zd4uzbWI2ycXbWk/7boTuUcRMImAfG8Fwn/dTzP1djzOjOZDAOO1ya/qweNGuzRf9FF/ RhLvGXe7JeeiISLvxhMesFePlIrzUWWRZVT4frw1FdSzfgMZilZfhiwi5qfY4LN3hvd/ laUyiO2Z+GLZQGEetZ0zPCHSPi8glMHlrW7rQd9X79M+WvAuSQVtYqha/mBDamd/R/kq p30w== X-Gm-Message-State: AOUpUlFwCjOetOtJ+wT6o0na1sF2msDwSyCMaI6IPWO5u1+/UGoqcKDR jhSNkYMtTzAvUkYQXwkrtxlGxQuIZn2+QrdQQkFpkg== X-Google-Smtp-Source: AAOMgpeoQXUAcCeGKCdlF6jBsQrBOgBSZU+CKJaEsXCh0qzVoGwvlOO2OV1kkFTOGXQVtbHT50adYMgKNQjyUhtvjyI= X-Received: by 2002:a24:b211:: with SMTP id u17-v6mr12671782ite.1.1532929368063; Sun, 29 Jul 2018 22:42:48 -0700 (PDT) MIME-Version: 1.0 References: <201807292102.w6TL2Cq4062739@pdx.rh.CN85.dnsmgr.net> <144DA23D-26CF-4293-AE97-54CC8D6B52E3@gmail.com> <5B5EA213.9090006@grosbein.net> In-Reply-To: <5B5EA213.9090006@grosbein.net> From: Warner Losh Date: Sun, 29 Jul 2018 23:42:36 -0600 Message-ID: Subject: Re: Request for comments, new geom part type alias: freebsd-geom To: Eugene Grosbein Cc: David Cross , "Rodney W. Grimes" , FreeBSD Hackers Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.27 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Jul 2018 05:42:49 -0000 On Sun, Jul 29, 2018, 11:31 PM Eugene Grosbein wrote: > 30.07.2018 7:52, David Cross wrote: > > > Just a named GPT UUID type, like freebsd-swap, freebsd-ufs > > > > As for ambiguous data: consider you have a RAID 10 of a UFS filesystem. > > If you put that into freebsd-ufs freebsd-boot will see that and > potentially attempt to boot it. > > One should just be allowed to mark such a partition "unbootable" so no > loader even tries to boot it. > And use any kind of label you like including freebsd-ufs. > How does one do that? We should not "workaround" deficiencies of our loaders (if any) but fix it > instead of invention of new partition types just for that strange reason. > Normally this is a non issue. > If you have a raw raid gstripe, what shows up to the BIOS as to what this > drives is depends > > entirely on the _contents_ of the drive at a specific position, > information that could be controlled by a user. > > Why is it important how BIOS shows gstripe'd partitions if they are marked > not bootable? > > There were times when BIOSes unconditionally booted from floppy disk drive > if it had readable floppy disk > at boot time, so boot area of such floppy disks had special code saying > "Non-system disk, replace and strike a key" > if a floppy was not supposed to be bootable. Boot area of our non-bootable > partitions might have something similar. > No. They don't. There is no standard way to mark something unbootable... Warner _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >