Date: Mon, 2 May 2016 21:43:43 +0200 From: Sebastian Wolfgarten <sebastian@wolfgarten.com> To: Matthias Fechner <idefix@fechner.net>, freebsd-questions@freebsd.org Subject: Re: ZFS migration - New pool lost after reboot Message-ID: <2D936447-34C1-471B-8787-8075B19F8B28@wolfgarten.com> In-Reply-To: <72087b33-53f9-e298-1441-4988c2a5ecb3@fechner.net> References: <0A383C91-FCBA-4B9E-A95A-157A13708125@wolfgarten.com> <72087b33-53f9-e298-1441-4988c2a5ecb3@fechner.net>
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Hi Matthias, dear list, I have build a new VM to test this further without affecting my live machine. When doing all these steps (including the amendment of loader.conf on the new pool), my system will boots up with the old pool. Any ideas why? Here is what I did: 1) Create required partitions on temporary hard disk ada2 gpart create -s GPT ada2 gpart add -t freebsd-boot -s 128 ada2 gpart add -t freebsd-swap -s 4G -l newswap ada2 gpart add -t freebsd-zfs -l newdisk ada2 gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada2 2) Create new pool (newpool) zpool create -o cachefile=/tmp/zpool.cache newpool gpt/newdisk 3) Create snapshot of existing zroot pool and copy it over to new pool zfs snapshot -r zroot@movedata zfs send -vR zroot@movedata | zfs receive -vFd newpool zfs destroy -r zroot@movedata 4) Make the new pool bootable zpool set bootfs=newpool/ROOT/default newpool 5) Mount new pool and prepare for reboot cp /tmp/zpool.cache /tmp/newpool.cache zpool export newpool zpool import -c /tmp/newpool.cache -R /mnt newpool cp /tmp/newpool.cache /mnt/boot/zfs/zpool.cache in /mnt/boot/loader.conf the value of kern.geom.label.gptid.enable=„0“ changed to „2" zfs set mountpoint=/ newpool/ROOT reboot After the reboot, the machine is still running of the old zfs striped mirror but I can mount the newpool without any problems: root@vm:~ # cat /boot/loader.conf kern.geom.label.gptid.enable="0" zfs_load="YES" root@vm:~ # zpool import -c /tmp/newpool.cache -R /mnt newpool root@vm:~ # cd /mnt root@vm:/mnt # ls -la total 50 drwxr-xr-x 19 root wheel 26 May 2 23:33 . drwxr-xr-x 18 root wheel 25 May 2 23:37 .. -rw-r--r-- 2 root wheel 966 Mar 25 04:52 .cshrc -rw-r--r-- 2 root wheel 254 Mar 25 04:52 .profile -rw------- 1 root wheel 1024 May 2 01:45 .rnd -r--r--r-- 1 root wheel 6197 Mar 25 04:52 COPYRIGHT drwxr-xr-x 2 root wheel 47 Mar 25 04:51 bin -rw-r--r-- 1 root wheel 9 May 2 23:27 bla drwxr-xr-x 8 root wheel 47 May 2 01:44 boot drwxr-xr-x 2 root wheel 2 May 2 01:32 dev -rw------- 1 root wheel 4096 May 2 23:21 entropy drwxr-xr-x 23 root wheel 107 May 2 01:46 etc drwxr-xr-x 3 root wheel 52 Mar 25 04:52 lib drwxr-xr-x 3 root wheel 4 Mar 25 04:51 libexec drwxr-xr-x 2 root wheel 2 Mar 25 04:51 media drwxr-xr-x 2 root wheel 2 Mar 25 04:51 mnt drwxr-xr-x 2 root wheel 2 May 2 23:33 newpool dr-xr-xr-x 2 root wheel 2 Mar 25 04:51 proc drwxr-xr-x 2 root wheel 147 Mar 25 04:52 rescue drwxr-xr-x 2 root wheel 7 May 2 23:27 root drwxr-xr-x 2 root wheel 133 Mar 25 04:52 sbin lrwxr-xr-x 1 root wheel 11 Mar 25 04:52 sys -> usr/src/sys drwxrwxrwt 6 root wheel 7 May 2 23:33 tmp drwxr-xr-x 16 root wheel 16 Mar 25 04:52 usr drwxr-xr-x 24 root wheel 24 May 2 23:21 var drwxr-xr-x 2 root wheel 2 May 2 01:32 zroot root@vm:/mnt # cd boot root@vm:/mnt/boot # cat loader.conf kern.geom.label.gptid.enable="2" zfs_load=„YES" My question is: How do I make my system permanently boot off the newpool such that I can destroy the existing zroot one? Many thanks for your help, it is really appreciated. Best regards Sebastian > Am 29.04.2016 um 10:25 schrieb Matthias Fechner <idefix@fechner.net>: > > Am 28.04.2016 um 23:14 schrieb Sebastian Wolfgarten: >> 5) Mount new pool and prepare for reboot >> >> cp /tmp/zpool.cache /tmp/newpool.cache >> zpool export newpool >> zpool import -c /tmp/newpool.cache -R /mnt newpool >> cp /tmp/newpool.cache /mnt/boot/zfs/zpool.cache >> zfs set mountpoint=/ newpool/ROOT >> reboot > > I think you forgot to adapt vfs.zfs.mountfrom= in /boot/loader.conf on the new pool? > > > > Gruß > Matthias > > -- > > "Programming today is a race between software engineers striving to > build bigger and better idiot-proof programs, and the universe trying to > produce bigger and better idiots. So far, the universe is winning." -- > Rich Cookhelp
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