A data storage medium includes a convexoconcave structure formed in a storage area which is set on a first surface of a quartz glass substrate. The storage area includes a plurality of unit storage areas which are arrayed at least in one direction, and non-data storage areas which are disposed between the unit storage areas, which are adjacent to each other. The convexoconcave structure includes unit data patterns, address patterns and boundary patterns. The unit data patterns are formed in the plurality of unit storage areas respectively in the array sequence of the unit storage areas, and the address patterns are formed in the non-data storage areas so as to correspond to each of the unit storage areas in which the unit data patterns are formed respectively.

According to one embodiment, a production pallet control system comprises a plurality of magnetic disk devices configured to execute a plurality of processes, and the magnetic disk devices configured to output status information related to the process based on a requires from the outside and a controller connected to the magnetic disk devices in a mutually communicable manner, the controller configured to inquire the status information of each of the magnetic disk devices.

According to one embodiment, a production pallet control system comprises a plurality of magnetic disk devices configured to execute a plurality of processes, and the magnetic disk devices configured to output status information related to the process based on a requires from the outside and a controller connected to the magnetic disk devices in a mutually communicable manner, the controller configured to inquire the status information of each of the magnetic disk devices.

A noncontact communication medium includes a resonance circuit configured to resonate using an induced current induced by the antenna coil to generate an alternating current voltage, and a control circuit. The resonance circuit includes a variable condenser connected in parallel to the antenna coil, and a variable resistor connected in parallel to the antenna coil. The control circuit adjusts capacitance of the variable condenser to cause the resonance circuit to resonate at a predetermined resonance frequency, and adjusts a resistance value of the variable resistor to adjust a Q value. The noncontact communication medium operates using power based on a direct current voltage obtained by rectifying the alternating current voltage. And the communication is communication using a signal corresponding to a waveform of the alternating current voltage.

A noncontact communication medium includes a resonance circuit configured to resonate using an induced current induced by the antenna coil to generate an alternating current voltage, and a control circuit. The resonance circuit includes a variable condenser connected in parallel to the antenna coil, and a variable resistor connected in parallel to the antenna coil. The control circuit adjusts capacitance of the variable condenser to cause the resonance circuit to resonate at a predetermined resonance frequency, and adjusts a resistance value of the variable resistor to adjust a Q value. The noncontact communication medium operates using power based on a direct current voltage obtained by rectifying the alternating current voltage. And the communication is communication using a signal corresponding to a waveform of the alternating current voltage.

In at least one embodiment, an optical data storage tape is provided. The optical data storage tape includes a read/write data area including a plurality of writeable tracks for storing data thereon, each writeable track having a first track width. The optical data storage tape further includes a seam area positioned proximate to the read/write data area. The seam area including a plurality of non-writeable tracks, each non-writeable track including a second track width that is greater than the first track width for each writeable track.

In at least one embodiment, an optical data storage tape is provided. The optical data storage tape includes a read/write data area including a plurality of writeable tracks for storing data thereon, each writeable track having a first track width. The optical data storage tape further includes a seam area positioned proximate to the read/write data area. The seam area including a plurality of non-writeable tracks, each non-writeable track including a second track width that is greater than the first track width for each writeable track.

A noncontact communication medium includes a resonance circuit configured to resonate using an induced current induced by the antenna coil to generate an alternating current voltage, and a control circuit. The resonance circuit includes a variable condenser connected in parallel to the antenna coil, and a variable resistor connected in parallel to the antenna coil. The control circuit adjusts capacitance of the variable condenser to cause the resonance circuit to resonate at a predetermined resonance frequency, and adjusts a resistance value of the variable resistor to adjust a Q value. The noncontact communication medium operates using power based on a direct current voltage obtained by rectifying the alternating current voltage. And the communication is communication using a signal corresponding to a waveform of the alternating current voltage.

A noncontact communication medium includes a resonance circuit configured to resonate using an induced current induced by the antenna coil to generate an alternating current voltage, and a control circuit. The resonance circuit includes a variable condenser connected in parallel to the antenna coil, and a variable resistor connected in parallel to the antenna coil. The control circuit adjusts capacitance of the variable condenser to cause the resonance circuit to resonate at a predetermined resonance frequency, and adjusts a resistance value of the variable resistor to adjust a Q value. The noncontact communication medium operates using power based on a direct current voltage obtained by rectifying the alternating current voltage. And the communication is communication using a signal corresponding to a waveform of the alternating current voltage.

An optical-information recording/reproducing apparatus of the present invention is capable of carrying out position detection of a reproduction image even if reproduction image data with incomplete alignment marks (markers) is obtained. A relative correlation value is calculated from a first correlation value retained by a first correlation-value retaining unit and a second correlation value retained by a second correlation-value retaining unit, and pass/fail of a position detection result of the marker is judged according to the relative correlation value. The pass/fail of the position detection result is judged by mutually comparing the detection positions of the markers judged as passes by the relative correlation-value judgement, the positions of the markers judged as fail by the relative correlation-value judgement or the mutual position judgement is complemented, and the position of two-dimensional data is detected based on the pass-judged markers and the complemented markers.