Try loading the ZFS module with zfs_recover=1, and then try a read-only import.
rmmod zfs modprobe zfs zfs_recover=1
zpool import -o readonly -f -R /mnt POOL
If it imports, at least then you can see how your data looks.
Try loading the ZFS module with zfs_recover=1, and then try a read-only import.
rmmod zfs
modprobe zfs zfs_recover=1
zpool import -o readonly -f -R /mnt POOL
If it imports, at least then you can see how your data looks.