Tape drive that supports update-in-place

摘要

A method in a data processing system is disclosed for permitting update-in-place in a tape drive. Data in a particular record in a tape that is mounted on the tape drive is modified. The particular record is located in a particular one of multiple different tracks in the tape. A first end-of-data mark is written after the modified data. Data in the particular one of the different tracks that is located after the first end-of-data mark is invalidated. All remaining data in all others of the tracks remain valid after the first end-of-data mark is written.