A l exception de Ubuntu 21.10 qui a la 8000eme ligne du changenotes de la release precise : “”” The version of the ZFS driver included in the 5.13.0-19 kernel contains a bug that can result in filesystem corruption. Users of ZFS are advised to wait until the first Stable Release Update of the kernel in 21.10 before upgrading. “””

Et la tu te retrouve avec un ZFS tout pété, snapshoot et retour en arriere corrompue.