se connecter a la base en sysdba et faire un show parameter sur user_dump
#sqlplus /nolog SQL*Plus: Release 9.2.0.4.0 - Production on Ma Oct 18 14:02:30 2011 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. SQL> connect / as sysdba Connected. SQL> show parameter user_dump NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ user_dump_dest string /toaora/admin/udump