Isg_dataguard_issue_2

Question

Hi All;
We have an offline Dataguard Server. when i start applying archive at Dataguard it is showing me error
ORA-00283: recovery session canceled due to errors
ORA-01111: name for data file 66 is unknown - rename to correct file
ORA-01110: data file 66: '/u01/app/oracle/product/10.2.0/db_1/dbs/UNNAMED00066'
ORA-01157: cannot identify/lock data file 66 - see DBWR trace file
ORA-01111: name for data file 66 is unknown - rename to correct file
ORA-01110: data file 66: '/u01/app/oracle/product/10.2.0/db_1/dbs/UNNAMED00066'
i dont know what is this error also their is no such file in $ORACLE-HOME/dbs path
Plz Suggest for the same
Regards
Lucky

Answer 1

This behaviour is usually seen if a database has been restored from a backup which e.g. had a datafile dropped ( alter database datafile offline drop ) .
The database doesn't have an entry for the correct file name, but either the tablespace definition still exists or the control-file has some information about the file.
Verify the tablespace to which the file belongs and drop it, or issue the "offline drop" of the datafile again.