Ayone wondering about the filesystem, IBM developerWorks just finished its TENTH article called Advanced filesystem implementor's guide - focusing on Deploying XFS,
http://www-106.ibm.com/developerwork...pen&l=481,t=gr
There is also new page listing all Tutorials and Trainig offered:
http://www-106.ibm.com/developerwork...pen&l=481,t=gr