Typical scenarios in which you may receive an ORA-00214 include:
1. You have restored the control file from backup, but forgot
to copy it onto all of the mirrored copies of the control file
as listed in the "CONTROL_FILES" parameter in the "init.ora&
for this instance (or config.ora in an ifile configuration).
2. You have moved one or more copies of the control file to a
different location while the database was up and running.
3. You accidentally overwrote one of the copies of the control file
with an old copy.
4. The database or the system crashed while the mirrored copies of
the control file were being updated, causing them to be out of sync.
5. You are restoring a database backup that was improperly taken
with the database up and running ("fuzzy" backup).
The solution consists in opening the database with a single good copy
of the control file and then shutting the database down and copying
that version of the control file onto the other mirrored copies.
That will cause the next startup to succeed. The steps to be followed
1. If the database is still up, do a shutdown abort now.
2. Edit the init.ora file for this instance (or config.ora in an ifile
Find the CONTROL_FILES parameter and modify it to include
just ONE copy of the control file that you have reasons to
believe is up-to-date. For example, if you only have two
mirrored copies X and Y of the control file:
CONTROL_FILES = (X, Y)
and you know you have accidentally overwritten X with an old
CONTROL_FILES = (Y)
If you are not sure about it, choose any one of the control file
copies and remove or comment out all the other copies from the
3. Start up the database in restricted mode.
If the database comes up fine, move on to Step 4.
If instead you get ORA-1122, ORA-1110, and ORA-1207, go back to
Step 2 and make the CONTROL_FILES parameter point to another one
of the mirrored copies. If you have already tried each and
every one of the mirrored copies unsuccessfully, you must create
a new control file for the database. See the Solution Reference
to PR entry 1012929.6 ("How to Recreate the Control File").
If you get ORA-1113 and ORA-1110 pointing to one of the datafiles,
it means the copy of the control file you picked is good, but
the referenced datafile must be recovered before the database can be
opened. Try issuing a RECOVER DATABASE command and applying the
logs you are prompted for. You may have to resort to the online
logs to complete media recovery. For further details, see the
Solution Reference to PR entry 1012943.6 on ORA-1113. Once the
datafile is recovered, issue an ALTER DATABASE OPEN.
4. Shut the database down (normal or immediate).
5. Make all copies of the control file consistent.
Copy the good mirrored copy of the control file that you just used
to bring the database up onto all other copies, as originally listed
in the CONTROL_FILES parameter of your init.ora file (or config.ora
in an ifile configuration).
6. Restore the CONTROL_FILES parameter to its original value.
Edit the init.ora file for this instance (or config.ora in an ifile
configuration) to make the CONTROL_FILES parameter include
all mirrored copies of the control file again.
7. Start up the database.