ORA-19500: device block size string is invalid
Cause : the device block size returned by sequential I/O OSD is invalid
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
If the block size was set by using the PARMS option of the Recovery Manager ALLOCATE CHANNEL command, then the specified block size must be changed. If no PARMS option was specified on the ALLOCATE CHANNEL command, then this is an internal error that should be reported to Oracle.
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.