ORA-01578: ORACLE data block corrupted in UNDO
I am getting following error at database startup:(My database is on Windows Server)
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SQL*Plus: Release 11.2.0.1.0 Production on Tue May 10 14:02:31 2011
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to an idle instance.
SQL> STARTUP;
ORACLE instance started.
Total System Global Area 2.1379E+10 bytes
Fixed Size 2185160 bytes
Variable Size 1.0133E+10 bytes
Database Buffers 1.1207E+10 bytes
Redo Buffers 36151296 bytes
Database mounted.
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-01578: ORACLE data block corrupted (file # 3, block # 240)
ORA-01110: data file 3: 'G:\APP\ORACLE\ORADATA\ORUSX2\UNDOTBS01.DBF'
Process ID: 5972
Session ID: 234 Serial number: 3
Please help me to resolve this issue?
Thanks
Jitendra R. Desaria