ORA-1555 Zero Duration/ ORA-600 [ktbdchk1: bad dscn] / ORA-600  / after Physical Standby switchover
(Doc ID 1577824.1)
Last updated on JULY 17, 2020
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.1 to 11.2]
Oracle Database - Enterprise Edition - Version 184.108.40.206 to 220.127.116.11 [Release 12.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Information in this document applies to any platform.
The Following Errors May Occur in a Physical Standby database after a switchover :
ORA-600 [ktbdchk1: bad dscn]
Sometimes the following errors are also reported
Also With the fix of Bug 7517208 which is included by default in 10.2.0.5 Patch Set and versions >= 18.104.22.168 (Base Release), the DBVERIFY utility reports this SCN inconsistency with error:
Page <Block#> failed with check code 6056
There is NO DATA CORRUPTION in the block , The DBVERIFY utility falsely reports SCN corruption.
Physical Standby switchover
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