Which of the following is an analysis and removal of redundant data after a complete backup and after the data has been written to storage?

Inline deduplication performs data deduplication *as* the data is being written to storage, before it is fully committed, which is contrary to the question's description of deduplication happening after data has been written.

OOS (Out of Service) indicates that a system or component is not operational and has no direct relation to data deduplication processes.

Post-processing deduplication is a data reduction technique where redundant data blocks are identified and removed from storage *after* the data has been initially written to the storage system. This method allows the data ingest process to occur quickly, with the deduplication task running subsequently in the background.

CAS (Content-Addressable Storage) is a storage architecture where data is retrieved based on its content ID, not a specific method of post-write data deduplication.