Cause: Concurrent update activity on a control file caused a process to read inconsistent information from the control file without a lock. Action: Retry the operation.

Cause: The attempted operation cannot be executed at this time because another process currently holds the snapshot control file enqueue. Action: Retry the operation after the concurrent operation that is holding the snapshot control file enqueue terminates.

Cause: The filename supplied as a parameter to the ALTER DATABASE BACKUP CONTROLFILE command or to cfileSetSnapshotName matches the name of the specified currently mounted control file. Action: Retry the operation with a different filename.

Cause: An invocation of CREATE DATABASE or CREATE CONTROLFILE was executed specifying a combination of parameters that would require the control file size in blocks to exceed the maximum allowable value. Action: In the case of CREATE DATABASE or CREATE CONTROLFILE, use a different combination of MAXDATAFILES, MAXLOGFILES, MAXLOGMEMBERS, MAXLOGHISTORY, and MAXINSTANCES clauses.

Cause: An Oracle7 to Oracle8 convert file contains invalid data or was created with an different version of the migration utility. This error can also be caused by incorrect ORACLE_HOME environment variable when ALTER DATABASE CONVERT command is issued. Action: Use a correct version of the convert file or regenerate it with the migration utility.…

Cause: An error occurred when writing to one or more of the control files. Action: See accompanying messages.

Cause: The control file was missing some new record types supported by this release. These record types are automatically added by resizing the contol file during mount. The resize has failed. Action: Look in the alert log for the reason that the resize has failed. If indicated in the alert log, give the control file…

Cause: An inconsistent set of control files, datafiles/logfiles, and redo files was used. Action: Use a consistant set of control files, datafiles/logfiles, and redo log files. That is, all the files must be for the same database and from the same time period.

Cause: The mount ID in the control file is not the same as the mount ID in the control file used by the first instance to mount this database. The control files are for the same database but they are not the same files. Most likely one instance is using a backup control file. Action:…

Cause: A disk I/O failure was detected on reading the control file. Action: Check if the disk is online, if it is not, bring it online and try a warm start again. If it is online, then you need to recover the disk.