Date: Fri, 25 Oct 2002 12:54:50 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Bruce Evans <bde@zeta.org.au> Cc: "David W. Chapman Jr." <dwcjr@inethouston.net>, Dag-Erling Smorgrav <des@ofug.org>, Mark Valentine <mark@thuvia.demon.co.uk>, John Baldwin <jhb@freebsd.org>, Poul-Henning Kamp <phk@critter.freebsd.dk>, cvs-all@freebsd.org, cvs-committers@freebsd.org, Takahashi Yoshihiro <nyan@jp.FreeBSD.org>, Bakul Shah <bakul@bitblocks.com> Subject: Re: cvs commit: src/lib/libdisk Makefile chunk.c write_alpha_dis Message-ID: <Pine.BSF.4.21.0210251250260.7147-100000@InterJet.elischer.org> In-Reply-To: <20021026052106.L5096-100000@gamplex.bde.org>
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On Sat, 26 Oct 2002, Bruce Evans wrote: > On Fri, 25 Oct 2002, David W. Chapman Jr. wrote: > > > > > Mark Valentine <mark@thuvia.demon.co.uk> writes: > > > > > The MBR partitioning is a feature of the MBR boot code, not of the BIOS. > > > > > > > > Wrong. Plenty of recent-issue BIOSen (particularly on laptops) go > > > > down in flames if the MBR does not contain a valid partition table. > > > > > > Wrong yourself. Mark unfortunately understands how MBRs are supposed to > > > work. It is a layering violating for the BIOS to look in the private > > > parts of the bootstrap code for another subsystem. > > > > Just because it is wrong does not mean it does not happen. Haven't > > we already been down this bikeshed with DD? > > Not quite. DD functionality hasn't been axed, so people who like it can > still use it. They can make things work by not using ****ware on which it > doesn't work. After axing, this is more painful because it involves not > using FreeBSD or maintaining huge local patches. DD as we called it (I originally coined that term) is still supported with geom and will continue to be. It is part of the disk layering philosophy that you should be able to do just that so it's not going anywhere. The only thing being lost by using real layering is the inablilty to describe strange though useful partitionning schemes and the ability to predict the minor numbers of a partition, but then anyone who relies on that has had plenty of warning that they are doing something foolish. > > Bruce > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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