* Make the LOB smaller before performing the conversion. for example, by using SUBSTR on CLOB
* Use DBMS_LOB.SUBSTR to convert CLOB to CHAR.
- Create a hybrid columnar compressed table with a LONG data type.
- Alter an existing table with a LONG data type to be hybrid columnar compressed.
- Add a LONG data type column to a hybrid columnar compressed table.
- UPDATE_DB lowering the DISK_SPACE_RESERVE value.
- UPDATE_PROTECTION_POLICY setting the guaranteed_copy parameter to YES
- DELETE_SBT_LIBRARY where backup data for the given database existed. New backup requests may be stalled until the system can recompute the safety of allowing additional backup data or backup data may be lost.
* An individual backup piece exceeded the database protection policy DISK_RESERVE_SPACE value. * Guaranteed_copy is enabled but not enough data has been spooled to tape. * Misconfiguration of the storage location size.