FreeBSD/Bugs
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After upgrading to FreeBSD 13 the following happened upon boot:
Booting from Hard Disk... Keyboard: yes /boot/config: -P FreeBSD/x86 boot Default: zroot/ROOT/default:/boot/zfsloader boot: ZFS: unsupported compression algorithm 16 ZFS: ifo error - all block copies unavailable Invalid format FreeBSD/x86 boot Default: zroot/ROOT/default:/boot/zfs loader boot:
In this case the fix[1] was to boot into e.g. FreeBSD-13.1-RELEASE-amd64-memstick.img.xz and install the bootcode again:
$ zpool import pool: zroot id: 17982517483651182104 state: ONLINE action: The pool can be imported using its name or numeric identifier. config: zroot ONLINE vtbd0p3 ONLINE $ gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 vtbd0 partcode written to vtbd0p1 bootcode written to vtbd0
For future upgrades one could use bectl to help with that:[2]
bectl create 13.0-RELEASE bectl mount 13.0-RELEASE /mnt zfs set mountpoint=/mnt/usr/src zroot/usr/src mount -t devfs devfs /mnt/dev chroot /mnt /bin/sh freebsd-update upgrade -r 13.0-RELEASE freebsd-update fetch freebsd-update install exit umount /mnt/dev zfs set mountpoint=/usr/src zroot/usr/src bectl umount 13.0-RELEASE bectl activate 13.0-RELEASE shutdown -r now pkg-static install -f pkg pkg upgrade gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 vtbd0 zpool upgrade -a shutdown -r now freebsd-update install bectl destroy -o 12.2-RELEASE