Data are written to plural parallel data tracks of a data storage medium by arranging a data stream into plural streams of data sets. Each stream of data sets is allocated to a corresponding respective group of parallel data tracks. A plurality of the data sets are written to the plural data track groups,...http://www.google.de/patents/US7127554?utm_source=gb-gplus-sharePatent US7127554 - Writing data to a storage medium in data sets commencing at a same position along the storage medium