Patent ID: 8132506

Claim:
A media processing device comprising: a data writing means that applies a data writing process to one side of a target medium; a printing means that applies a printing process to the other side of the target medium; a media storage means that stores the target medium; a transportation means that transports the target medium to any one of the data writing means, the printing means, and the media storage means according to a command received from a host computer; a position detection means that detects the position of the transportation means; and a storage means that stores the position where the position detection means detected the transportation means as a starting point; wherein the transportation means reports an error to the host computer when the target medium cannot be transported according to the command from the host computer, and if the position detection means detects that the transportation means is not in motion; wherein the transportation means does not execute the received command if the starting point is not stored in the storage means when the command is received from the host computer, and if the position detection means detects that the transportation means is in motion.