LTFS – Linear Tape File System. This presents a file:folder interface to LTO tapes. LTFS stores files and their metadata on the same tape and makes the data accessible through the file system interface. The LTFS standard defines the data recording structure on the tape and the metadata format in XML. It creates a full index when new files are added. V2.5 of the LTFS format specification uses a new and incremental indexing method with a journal-like capability where only changes to the index need to be recorded frequently. A complete index is required to be written at un-mount time.