Date: Sun, 15 Sep 2013 10:16:02 -0400 From: J David <j.david.lists@gmail.com> To: Andriy Gapon <avg@freebsd.org> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org>, freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: zfs_enable vs zfs_load in loader.conf (but neither works) Message-ID: <CABXB=RR%2B5toQjRJRuf2yuj1updnTn1FqWnckn6fX4N%2BSr_6T4g@mail.gmail.com> In-Reply-To: <52331179.4030201@FreeBSD.org> References: <CABXB=RTz6jM=B895Bo6Kp-ZAf2pvTZkm-HfS=PrfX=aMKqjMbw@mail.gmail.com> <523310E2.4050702@FreeBSD.org> <52331179.4030201@FreeBSD.org>
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Thanks very much for the info Andriy. On Fri, Sep 13, 2013 at 9:22 AM, Andriy Gapon <avg@freebsd.org> wrote: > Another piece of information is that neither mountpoint nor canmount property > affects ZFS root mounting. It is mountpoint=legacy that boots on this machine and mountpoint=/ that can't find init, with no other changes. So clearly under some obscure edge case, this is not strictly correct. Did your test include zpool root != filesystem root? Because as you describe one possible cause of the problem is mounting the wrong filesystem as root, one wonders if somehow with the mountpoint=/ setting the zpool root (which has no files at all) is incorrectly being chosen as fsroot with mountpoint=/ on data/root. I.e. perhaps somewhere in the code is looking for "legacy" (or skipping anything with a mountpoint set) and defaulting back to the zpool root if it is not found? Unfortunately there is no way I know of to check and see what the root filesystem turned out to be after the failure to find init. That would reduce speculation about what is happening quite a bit. Can the kernel debugger extract this info? If it matters, the pools in question are fairly complex, not just throwing everything possible on one drive. Example: NAME STATE READ WRITE CKSUM data ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da0p2 ONLINE 0 0 0 da4p2 ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 da1p2 ONLINE 0 0 0 da5p2 ONLINE 0 0 0 mirror-2 ONLINE 0 0 0 da2p2 ONLINE 0 0 0 da6p2 ONLINE 0 0 0 mirror-3 ONLINE 0 0 0 da3p2 ONLINE 0 0 0 da7p2 ONLINE 0 0 0 logs ada0p2 ONLINE 0 0 0 cache ada1p2 ONLINE 0 0 0 The boot order for that system begins at either ada0 or da0, not sure which without checking the BIOS. Thanks!
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