1. A data storage processing apparatus, comprising: storing means for storing multiple path map information, said storing means including first and second storage means configured for processing data access to a first storage medium having comparatively high data access speed and a removable second storage medium having comparatively low data access speed, respectively; accessing means for accessing said storage media; and control means for controlling said storing means and said accessing means based on a command, said control means configured to control said first and second storage means to divide storage area of said first storage medium and storage area of said second storage medium into a plurality of areas, respectively, to use a first part of the divided storage areas of said first storage medium and a first part of the divided areas of said second storage medium responding to a first command from a first control line, and to use a second part of the divided storage areas of said first storage medium and a second part of the divided storage areas of said second storage medium responding to a second command from a second control line; wherein said path map information includes: a file system information indicating the type of file systems; a file type information stored as a plurality of entries with respect to said file system information to identify a file and a directory to be accessed under the file system shown by said file system information and a mounting point indicating switching point to other file system; and a pointer information indicating the storage position of path map information with respect to said other file systems in the case said file type information is said mount point.