ORA-00394 Online log reused while attempting to archive it

Cause: It has been detected that an online log that is being archived has been reused Action: Cannot archive the logfile anymore since it has been overwritten

ORA-00368 Checksum error in redo log block

Cause: The redo block indicated by the accompanying error, is not vaild. It has a checksum that does not match the block contents. Action: Do recovery with a good version of the log or do time based recovery up to the indicated time. If this happens when archiving, archiving of the problem log can be…