Date: Tue, 24 Dec 2013 07:53:24 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: Upgrading 8.1 -> 9.x with ZFS rroot Message-ID: <52B93D74.9010004@infracaninophile.co.uk> In-Reply-To: <20131224010912.M13790@brightstar.bomgardner.net> References: <20131224010912.M13790@brightstar.bomgardner.net>
next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --7VbjPLF1HBotVfN1R7KEbCQPV00X933ci Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 24/12/2013 01:13, Gene wrote: > I'm planning to move from my current FBSD 8.1 (amd64) to 9.2. My concer= n is=20 > that i'm using ZFS complete with a zfs root and I need to be sure that = I don't=20 > manage to screw up that root. Can someone point me to some good reading= on ths=20 > subject - >=20 If you're using ZFS then boot environments are your friend. Essentially you can set up a boot environment, upgrade everything to 9.2 inside it, activate it and reboot. If the new system doesn't work correctly, then you can re-activate your original 8.1 system and revert. Start by installing the beadm(1) utility from ports. Tip: you can mount a boot environment onto your running system using beadm, and chroot(8) into it to upgrade it, but you will need mount a devfs instance on it as well: # beadm mount YOURBEINSTANCE /mnt # mount -t devfs devfs /mnt/dev # chroot /mnt ... work on the BE ... # exit # umount /mnt/dev # beadm umount YOURBEINSTANCE There are some incompatible changes to the on-disk formats between ZFS on 8.1 and 9.2: in general, 9.2 will be perfectly happy with ZFS from 8.1, but not vice-versa. So don't run 'zpool upgrade' or 'zfs upgrade' until you are entirely happy with your new 9.2 setup. Also, there have been incompatible changes to things like gptzfsboot -- here the new gptzfsboot introduces some pretty useful new functionality, but again, it's not backwardly compatible. I've a feeling it may not be forwards compatible either... Make sure you have bootable media for each of the different versions you're working with, as that makes it fairly simple to copy a matching set of boot blocks when needed. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. PGP: http://www.infracaninophile.co.uk/pgpkey JID: matthew@infracaninophile.co.uk --7VbjPLF1HBotVfN1R7KEbCQPV00X933ci Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.20 (Darwin) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQJ8BAEBCgBmBQJSuT10XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ2NTNBNjhCOTEzQTRFNkNGM0UxRTEzMjZC QjIzQUY1MThFMUE0MDEzAAoJELsjr1GOGkAT1DkP/3KZWTgu82NVd5hCsPLwwHN/ efV0vIO/vf/px5a2wY5A+cjm3TThDBZxn5dFzgBsBLlccjR/NQO396J75zHNUyY7 8KU0HPg42coP2HxUcfs/S348g2wxkLi1ZGx0zdBCBco6NAh8nh9slT70n0ehO2cU NkWyDEcBWP4gg3vGpU2nF3YV7hiewpnDNyyL7TN5CTbLlBw34U02tYMOPEzhIIs9 fi+DTvFrkqnTnKcDaehTcelmoPdpO1nmxjlRtHxeclDndAbHWegVgNuKfTuZmprB /FOX8UUMyx2kyqNYYGLvMST0VU17KcT8VKYdRDrxnrPWdNb037ErCL80zN8yHv14 MjNq1ugp1jsHjRWlWj4V1MGfg6pZzhYoT2F1t35zMfNoX9ymMr2eREXNkdg05lb1 vc85tkofSh59h1elRsUywMuROS7wvSJKXhwoI9cagL+G/90zEGu0j6Eo6OWZ1L0i 371JtlEAbfTD3TUelUL1SSMa6jCSrb++VwMfm/epRZwEtN+XSdRjJeHQpf7eYN+f R9ULm65eeOrMxUgTcx5LXvIe5mYyMnPmPKcJmL8Cg6vpICzVOlVa3rBRej2OEahK URqqaT62wwdRV5beLW20b9fi/l/EKMIJGAIB5K09704GxFF+kcLu6XP8p5sb6i/u nfqPLHo0ASnVe6IWvmmW =1BU5 -----END PGP SIGNATURE----- --7VbjPLF1HBotVfN1R7KEbCQPV00X933ci--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?52B93D74.9010004>