Date: Mon, 12 Mar 2007 10:06:49 +0100 From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=) To: Barry Pederson <bp@barryp.org> Cc: freebsd-fs@FreeBSD.org, Pawel Jakub Dawidek <pjd@FreeBSD.org>, freebsd-geom@freebsd.org Subject: Re: zfs_20070303.patch on current Message-ID: <86ps7evniu.fsf@dwp.des.no> In-Reply-To: <45F2EEBD.6070007@barryp.org> (Barry Pederson's message of "Sat, 10 Mar 2007 11:45:33 -0600") References: <20070120073117.GB60202@x12.dk> <200703061246.09687.antik@bsd.ee> <45ED5850.6050506@nipsi.de> <200703061420.36980.antik@bsd.ee> <20070307135017.GC2864@garage.freebsd.pl> <45F2EEBD.6070007@barryp.org>
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Barry Pederson <bp@barryp.org> writes: > Is there any hope for someday optionally using ZFS as a root filesystem? For that to be possible, both /boot/boot2 and /boot/loader need to understand ZFS well enough to read files from it. There isn't much room to spare in /boot/boot2, so we'd have to have a separate version for ZFS and teach 'disklabel -B' how to pick the right one. > I was sort of imagining a setup where /boot resided in a UFS > filesystem so it could hold the kernel/modules/regular booting info > and - > /boot/loader.conf would specify 'zfs_load=3D"YES"' along with another > directive to tell which zfs filesystem to use as root. Unlike Linux, where this is a common configuration, FreeBSD can't mount a root filesystem underneath an already mounted /boot filesystem. Nor do we have anything resembling Linux's pivot_root which would allow us to mount the root filesystem on top of /boot and then switch them around. DES --=20 Dag-Erling Sm=F8rgrav - des@des.no
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