Relocate MySql data folder

rsync -avzh /var/lib/mysql /data
mv /var/lib/mysql /var/lib/mysql.bak
mkdir /var/lib/mysql
mount -B /data/mysql /var/lib/mysql

Additionally

/etc/fstab

/data/mysql     /var/lib/mysql  auto    defaults,nofail,nobootwait,bind 0       2