ORA-15024: discovered duplicately numbered ASM disk string
Cause : The discovery encountered two disks claiming to have the same ASM disk number.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Check that the ASM_DISKSTRING parameter specifies only a single path for each disk.
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.