zfs: cannot import : I/O error Destroy and re-create the pool from a backup source

Your FreeNAS, or FreeBSD, ZFS zpool lost power and can’t be accessed. Boot the machine and enter the boot loader menu and set these: set vfs.zfs.debug=1set vfs.zfs.recover=1set debug.bootverbose=1 boot -s <enter> to start the machine in single user mode. Once booted: zpool import -fFX -o readonly=on -R /mnt tank (or whatever the name of your ...