Recording medium having two different root directory informations respectively stored at two different locations

摘要

A recording medium (1) can store data which can be accessed exclusively by a particular person in a general circumstance of using a recording medium such as a personal computer circumstance. The recording medium stores the data having a directory structure. A first set of root directory information is recorded in a first section (1c). A second set of root directory information is recorded in a second section (1d) located at a predetermined position different from the position of the first section (1c). The first set of root directory information is a part of the second set of root directory information.