Date: Tue, 16 Apr 2013 09:14:04 +0200 From: David Demelier <demelier.david@gmail.com> To: Beeblebrox <zaphod@berentweb.com> Cc: freebsd-questions@freebsd.org Subject: Re: ZFS mounting failed with error 2 Message-ID: <CAO%2BPfDchiBoAcxLWVzW7fayxF6VHJO653_d7TrgBMAvNNdT-Cg@mail.gmail.com> In-Reply-To: <1366087768996-5804167.post@n5.nabble.com> References: <CAO%2BPfDev1L_1DcH8K8FwdAo8Sbd0-M5=j6tm6QyS%2BpixJbG9og@mail.gmail.com> <alpine.BSF.2.00.1304101040560.77823@mail.fig.ol.no> <CAO%2BPfDeeoWM08NvfEmUN0CJ-%2B6sCwpg8kxk6q_vHCPTD%2B0Ving@mail.gmail.com> <alpine.BSF.2.00.1304101153440.77823@mail.fig.ol.no> <CAO%2BPfDfoGXC=UqcqYOQrssn8B_d54cEpajL-3hHs0B9neueHaQ@mail.gmail.com> <1366087768996-5804167.post@n5.nabble.com>
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2013/4/16 Beeblebrox <zaphod@berentweb.com>: >>> one thing I'm not sure about is that some people create a dataset root but > that actually mounts at / (and not /root) and some just create others mount > points directly on the zpool > > You can do this either way. A ZFS dataset is created at the same time and > with the same name as the zpool. You can use the zpool-named-dataset as root > without any problem. As I recall, the separate root dataset was a > work-around for some old problem, so it is not necessary any longer. That > said, you can place and name the zfs root dataset anywhere you want, as long > as you have the 'vfs.root.mountfrom=' path set correctly. In your example, > it is set correctly. > > Now as to why you cannot boot - from my experience, the problem is your last > command: > '# zpool export tank' will leave the pool in an exported state, and when the > system tries to boot, it will not be able to locate the zpool because the > pool is in exportland. The solution is different. After you are finished > with all your settings you should > # zfs umount -a (unmount all tank & child datasets in /mnt) > # zfs set mountpoint=/ tank > # reboot Thank you so much, you made my day :-) For me I thought that export was a kind of unmounting so I should have never found if you didn't helped me on that case :p. > > At step 2, dataset tank should not try to re-mount its self and remain > un-mounted. The older versions of ZFS did not behave this way and would > immediately mount the zpool on root. If this happens, you have to hard-reset > and such because the system will freeze up. If all goes well, before reboot > you can also check (zfs get all tank) and make sure that canmount=on is set > for tank. > > The best zfs guide is FreeBSD's own docs: https://wiki.freebsd.org/RootOnZFS > -- Demelier David
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