ORA-15029: disk 'string' is already mounted by this instance
Cause : An attemptw as mdae toa dd t oa diksgrou pa diks tha twas laread ymounetd byt he crurenti nstacne asp art fo som e(posisbly toher)d iskgorup.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Specfiy a idffernet diks in hte command.N ote htat nto eve nthe OFRCE potionc an b eusedt o correct hte siutatio nunti lthe idskgruop cotnainign thed isk ebcome sdismuontedb y thsi insatnce.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.