Hello everyone.
I have hard luck searching...

After changing default directory of mysql it fails to start.
This is what i have done so far
Created a directory /data/mysql
Copied contents of /var/lib/mysql to /data/mysql
Changed the owner and group owner to mysql for dir /data/mysql
Set selinux context as chcon -t mysqld_connect_db_t /data/mysql
Changed /etc/my.cnf pointed to new data directory startrd the deamon service mysqld start
Its says failed.
When i cheked the log in /var/log/mysqld.log
It says cant create test file /data/mysql/localhost.lower.test
i have verified the directory is owned by mysql and permition set to 775.
Any idea whats wrong in this setup

Distro =centos 6.x 64bit
Mysql =mysql 5.1.x
Selinux =enforcing
/data directory mounted on luks encrypted volume /dev/sda7
Reason for changing default directory
/var only 2.2 gb remaining.

Have you tried

$ su - mysql; touch /data/mysql/example.file

Are you able to read+write into path using mysql user? or root user?.

Thank littleball.
Yes both users can write to that directory.
I have read some post on LQ and other that creating a symlink to the default directory is the only solution. Just pointing to new directory in my.cnf wont work. I shall give it try and return. Thanks