Oracle® Database 11g / 12c / 18c error codes ORA-01145: offline immediate disallowed unless media recovery enabled

ORA-01145: offline immediate disallowed unless media recovery enabled

Oracle Error Code: ORA-01145

Cause: ALTER TABLESPACE ... OFFLINE IMMEDIATE or ALTER DATABASE DATAFILE ... OFFLINE is only allowed if database is in ARCHIVELOG mode.

Action: Take tablespace offline normally or shutdown abort. Reconsider your backup strategy. You could do this if you were archiving your logs.