Plesk upgrade fails with following message:
Trying to backup MySQL database...
ERROR while trying to backup MySQL database
Check the error reason(see log file: /tmp/plesk_11.0.9_installation.log), fix and try again
Upgrade log file
=== Preparing upgrade
chown: changing ownership of `/storage/mysql.preupgrade.11.0.9-126.96.36.19930616-153540.dump.gz': Operation not permitted
NFS server does not allow change of ownership on files, which causes Plesk pre-upgrade operations to fail.
/etc/psa/psa.conf and change value of
DUMP_D parameter to
/var/lib/psa/dumps . After that, repeat upgrade attempt.