A writing method suitable for practice with magnetic tape cassettes in particular. After writing a first stream of file data on the tape in the form of a series of file data blocks, there is created one or more, preferably two, file mark blocks immediately after the last file data block. Then, in writing...http://www.google.de/patents/US5319503?utm_source=gb-gplus-sharePatent US5319503 - Method and apparatus for writing successive streams of data on a magnetic medium by writing a cancel mark indicating the cancellation of a previously-written file mark