Schema, database, or tables in different folders?

Is there a way to create a database or a table of a database in its own folder?  We are looking for ways to backup the sytem files of the database to tape and one to exclude some tables from this backup.  We can selectively backup folders of the file system so we figure that if we can create a schema or database or table in its own folder, we can backup our database and exclude the tables selectively.  We are using Linux RedHat.  Thank you.