ORA-15131: block string of file string in diskgroup string could not be read
Cause : A block could not be read because the disk containing the block is either offline or an I/O error occured while reading the block. If this is mirrored file, then all disks that contain a the block are either offline or received errors.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Repair the affected disk and bring it back online. Refer to accompanying error messages to determine which disk has failed.
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.