METHOD FOR CHANGING OPERATION ON A STORAGE MEDIUM FROM A CURRENT FILE SYSTEM TO A NEW OR UPDATED FILE SYSTEM

摘要

The invention relates to changing the file system on a storage medium. A switch is carried out from a current file system to a new file system. While keeping valid the current file system, new file system data items (51, 53, 521-561; 91-93, 97, 941-971) are written (13) on the storage medium, except a short data item (21, 71) required for activating or validating the new file system data items. Thereafter the short data item is written, thereby activating the new file system. The short data can be written even following a power failure in a recorder into which the storage medium is inserted, whereby that write operation is carried out using shortly remaining power in the recorder.