I have change my /etc/psa/psa.conf DUMP_D and DUMP_D_TMP direcotry to a NAS folder.
Autoupdates fails everytime.
chown: changing ownership of '/nfsbkp/******/mysql.preupgrade.12.5.30-12.5.30.20161215-034720.dump.gz': Operation not permitted
Can be a solution use no_root_squash ? i this case...