Suggest you read the fine chapter "Managing Datafiles and Tempfiles" in the Administrator's Guide (Part No. B10739-01). --Terry ----- Original Message ----- How do you move the system, temp and undotbs1 from one mount point to another? I was able to move other tablespaces, but I know you can't take system, etc. offline? This is a 10g database. -- //www.freelists.org/webpage/oracle-l