ORA-00306: limit of string instances in this database
Cause: Starting this instance would exceed the maximum number of instances allowed for this database. This message occurs only with STARTUP shared and multiple instances.
Action: You cannot start more than the lower of a) port-specific limit as to the number of instances b) the number of instances specified at create-database time
ORA-00305: log string of thread string inconsistent; belongs to another database
Cause: The database ID in the redo log file does not match the database ID in the control file. This redo log file is not from the current database.
Action: Specify the correct redo log file, then retry the operation.
ORA-00304: requested INSTANCE_NUMBER is busy
Cause: An instance tried to start by using a value of the initialization parameter INSTANCE_NUMBER that is already in use.
Action: Either a) specify another INSTANCE_NUMBER, b) shut down the running instance with this number c) wait for instance recovery to complete on the instance with this number.
ORA-00303: cannot process Parallel Redo
Cause: A redo log containing Parallel Redo has been detected. The current Oracle release cannot process this format of redo.
Action: Use a later release that supports Parallel Redo. to process this log.
ORA-00302: limit of string logs exceeded
Cause: The maximum number of redo log files has been exceeded.
Action: Use the CREATE CONTROLFILE command with a larger value for MAXLOGFILES if the compatibility is lower than 10.2.0. Otherwise, allocate more storage space for the control file.
ORA-00301: error in adding log file ‘string’ – file cannot be created
Cause: The creation of the redo log file failed
Action: Check: 1) there is enough storage space on the device 2) the name of the file is valid 3) the device is online 4) an IO error occurred Also, it is possible REUSE was specified on the command line and a file of the incorrect size exists. Either do not specify REUSE or use a file of the correct size.
ORA-00300: illegal redo log block size string specified – exceeds limit of string
Cause: The specified block size of the redo log is greater than the maximum block size for the operating system.
Action: Create the redo log on a device with a smaller block size
ORA-00299: must use file-level media recovery on data file string
Cause: The control file does not contain an entry for this file, so block media recovery cannot be done.
Action: Restore the data file and perform file-level media recovery.
ORA-00298: Missing or invalid attribute value
Cause: A non-zero integer value is required when the following keyword attributes are specified: TIMEOUT, EXPIRE, DELAY, NEXT
Action: Correct the syntax and retry the command.
ORA-00297: must specify RECOVER DATAFILE LIST before RECOVER DATAFILE START
Cause: The RECOVER DATAFILE START command was issued, but no RECOVER DATAFILE LIST commands had been issued. This only happens when doing recovery with Recovery Manager, and is an internal error in Recovery Manager, because Recovery Manager should always issue RECOVER DATAFILE LIST before RECOVER DATAFILE START.
Action: Contact customer support