Date: Sat, 26 Oct 2002 14:52:29 +0100 (BST) From: Mark Valentine <mark@thuvia.demon.co.uk> To: Bruce Evans <bde@zeta.org.au> Cc: Terry Lambert <tlambert2@mindspring.com>, Julian Elischer <julian@elischer.org>, Poul-Henning Kamp <phk@critter.freebsd.dk>, "M. Warner Losh" <imp@bsdimp.com>, <freebsd-arch@FreeBSD.ORG> Subject: Re: cvs commit: src/lib/libdisk Makefile chunk.c write_alpha_disk.c write_i386_disk.c write_pc98_disk.c Message-ID: <200210261352.g9QDqT4V005261@dotar.thuvia.org> In-Reply-To: <20021026225635.C7892-100000@gamplex.bde.org>
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> From: Bruce Evans <bde@zeta.org.au> > Date: Sat 26 Oct, 2002 > Subject: Re: cvs commit: src/lib/libdisk Makefile chunk.c write_alpha_disk.c write_i386_disk.c write_pc98_disk.c > On Sat, 26 Oct 2002, Mark Valentine wrote: > > By the way, FreeBSD doesn't seem to be consistent about which partition it > > uses, but I've never tried to figure out when it uses partition 1 and when > > it uses partition 4, though I've seen both occur on disks with only FreeBSD > > (is it DD mode that makes the difference?). > > It is consistent: the first slice with type 0xa5 is mapped to the > compatibilty slice (except with GEOM of course). Sorry, I wasn't talking about the compat slice stuff here, but which slice FreeBSD uses when you initialize a disk. Sysinstall will obviously use partition 1 when installing to the whole disk. In fact what I'm seeing is the "fake" partition table reported for my DD disks, which uses partition 4 for some reason. So if I were to replace my root disk with one which wasn't DD (and if I were using GEOM), I'd likely have to fix up my fstab after restoring the root file system; this seems gratuitous. I'm still a little unclear about the claims that, with GEOM, you can still use /dev/da0c etc. for DD disks (I'm thinking removable media such as Jaz disks here). How does the fake MBR partition table affect this? > FreeBSD ignores the active partition flag. OK. Would it do more harm than good to use this as a hint when locating the compatibility slice? Cheers, Mark. -- Mark Valentine, Thuvia Labs <mark@thuvia.co.uk> <http://www.thuvia.co.uk>; "Tigers will do ANYTHING for a tuna fish sandwich." Mark Valentine uses "We're kind of stupid that way." *munch* *munch* and endorses FreeBSD -- <http://www.calvinandhobbes.com>; <http://www.freebsd.org>; To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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