Brenda,

As it's in /opt/.... can I assume it is a SUN box.

In AIX, best practices is to setup the DB and LOGS on a separate
filesystem, preferably spreading mirrors of each across separate
spindles.

The default DB and LOG is installed to get the server up and running,
and is normally far too small, however alows you to run the server while
creating and migrating onto your structured designed DB's

Rgrds

Richard