That's interesting. Just curious, do you recall what errors it reported? Did exp crash just from the datafiles being on a filesystem mounted with CIO, or did it only crash if you exported to a file that was on the CIO mounted filesystem? Thanks, Brandon -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Louis BROUILLETTE exp would crash until we mounted the datafile filesystem without CIO. Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. -- //www.freelists.org/webpage/oracle-l