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Old 05-07-2012, 11:47 AM
Anton Anton is offline
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Join Date: Apr 2012
Location: Auckland
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Default ORA-01186, ORA-01122, ORA-01110, ORA-01209 when opening standby as Read Only

Recently a site experienced ORA-1209 errors when opening the standby database read-only. A call was logged with Oracle Support and a summary of the solution is provided below:


When you open a standby database as read only, you notice the following in the database alert log.

< ORA-01186: file 5 failed verification tests
< ORA-01122: database file 5 failed verification check
< ORA-01110: data file 5: '/u02/oracle/oradata/prod/data01.dbf'
< ORA-01209: data file is from before the last RESETLOGS
< File 5 not verified due to error ORA-01122
< ORA-16004 signalled during: alter database open read only...


After investigation the following was noted:
  • File belong to a read-only tablespace called "DATA"
  • The database was recovered in the past and opened with resetlogs; both primary and standby show the same resetlogs_time in v$database
  • The datafile checkpoint_time in v$datafile_header show that it is before the v$database.resetlogs_time

To resolve the ORA-01209 to allow you to open the standby database read-only, follow these steps:

On the Primary Database:
  • Place the DATA tablespace in "Read Write" mode.
  • Take the datafile 5 offline
  • Recover datafile 5
  • Place tablespace DATA back in "Read Only" mode
  • Switch the current redo log and issue a checkpoint
  • Run dbvisit standby on both primary and standby

Example Steps on Primary Database:

sql> alter tablespace DATA read write;
sql> alter database datafile 5 offline;
sql> recover datafile 5;
sql> alter tablesapce DATA read only;
sql> alter system archive log current;
sql> alter system checkpoint;


Now run dbvisit on the Primary then Standby database.

You should now be able to open the standby database read only.
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"read only", ora-01110, ora-01122, ora-01186, ora-01209

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