Date: Mon, 28 Mar 2011 15:32:39 -0700 (PDT) From: Pratyush Dayal <pratyushdayal@yahoo.com> To: freebsd-questions@freebsd.org Subject: Cannot boot from ZFS (GPT) after 8.1 to 8.2 upgrade Message-ID: <121299.4153.qm@web161612.mail.bf1.yahoo.com>
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I had used this <http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/Mirror>; guide to setup FreeBSD 8.1 in a ZFS mirrored configuration using GPT. I have the following setup: % gpart show => 63 1250263665 ad4 MBR (596G) 63 1250263665 1 freebsd [active] (596G) => 0 1250263665 ad4s1 BSD (596G) 0 2097152 1 freebsd-ufs (1.0G) 2097152 8388608 2 freebsd-swap (4.0G) 10485760 10377216 4 freebsd-ufs (4.9G) 20862976 1048576 5 freebsd-ufs (512M) 21911552 1228352113 6 freebsd-ufs (586G) => 34 1953525101 ad5 GPT (932G) 34 128 1 freebsd-boot (64K) 162 4194304 2 freebsd-swap (2.0G) 4194466 1949330669 3 freebsd-zfs (930G) => 34 1953525101 ad6 GPT (932G) 34 128 1 freebsd-boot (64K) 162 4194304 2 freebsd-swap (2.0G) 4194466 1949330669 3 freebsd-zfs (930G) After the release of FreeBSD-8.2, I upgraded the system using the procedure described in the handbook (with some changed options for ZFS). Here are the steps that I used: # cd /usr/src # make buildworld # make buildkernel # make installkernel # shutdown -r now Then booted the system in single-user mode and did the following: # adjkerntz -i # zfs mount -a <-----(Changed from: mount -a -t ufs) # mergemaster -p # cd /usr/src # make installworld # mergemaster However, 'mergemaster' (after installworld) complained that it cannot install the files as the file system is read-only. Therefore, I did the following: # zfs set readonly=off zroot The 'mergemaster' finished successfully after this and all the required files were installed. Now, when I reboot the system, it cannot load the kernel. I get the following messages and subsequently loader prompt. 'definitions not found' 'forth not found' 'can't load kernel' My /boot/loader.conf has following lines pertaining to zfs: zfs_load="YES" vfs.root.mountfrom="zfs:zroot" I managed to import the ZFS pool by booting through MBR disk with UFS partition (ad4...see above) which also has FreeBSD 8.2. # zpool import -f -R /altroot zroot # mkdir /mnt/zroot # mount -t zfs zroot /mnt/zroot # zfs list NAME USED AVAIL REFER MOUNTPOINT zroot 16.1G 897G 819M legacy zroot/tmp 9.03M 897G 9.03M /altroot/tmp zroot/usr 15.1G 897G 8.63G /altroot/usr zroot/usr/home 432M 897G 432M /altroot/usr/home zroot/usr/ports 5.76G 897G 73.1M /altroot/usr/ports zroot/usr/ports/distfiles 5.69G 897G 5.69G /altroot/usr/ports/distfiles zroot/usr/ports/packages 20K 897G 20K /altroot/usr/ports/packages zroot/usr/src 309M 897G 309M /altroot/usr/src zroot/var 208M 897G 588K /altroot/var zroot/var/crash 21.5K 897G 21.5K /altroot/var/crash zroot/var/db 202M 897G 161M /altroot/var/db zroot/var/db/pkg 41.7M 897G 41.7M /altroot/var/db/pkg zroot/var/empty 20K 897G 20K /altroot/var/empty zroot/var/log 842K 897G 842K /altroot/var/log zroot/var/mail 70.5K 897G 70.5K /altroot/var/mail zroot/var/run 97K 897G 97K /altroot/var/run zroot/var/tmp 4.11M 897G 4.11M /altroot/var/tmp Please help me troubleshooting the problem. I have posted this problem on FreeBSD forums...please see this thread <http://forums.freebsd.org/showthread.php?t=22683>...where it has been suggested that the required bits of /boot/loader or /boot/zfsloader are missing. I do not know how to proceed further!
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