Last week I had performed switchover activity of database on version 11.2.0.3 The switchover was performed using dgmgrl "swicthover to standby" command. After sometime we started receiving "ORA-00600: [ktbdchk1: bad dscn]" on the primary database. Tue Dec 16 10:33:26 2014 Errors in file /ora_software/diag/rdbms/db02_dbv/dbv/trace/db02_ora_16271.trc (incident=434103): ORA-00600: internal error code, arguments: [ktbdchk1: bad dscn], [], [], … Continue reading ORA-00600: [ktbdchk1: bad dscn]