A cartridge according to the present technology includes: a cartridge case; and a memory. The cartridge case houses a magnetic tape. The memory is provided in the cartridge case, the memory storing information during data recording by the magnetic tape, the information being for adjusting a width of the magnetic tape during data reproduction by the magnetic tape.

A cartridge memory used for a tape cartridge, the cartridge memory including a communication unit that performs wireless communication, a control unit that transmits data to a recording/reproduction device according to a first communication standard via the communication unit, receives data from the recording/reproduction device according to the first communication standard via the communication unit, and transmits data to an information terminal according to a second communication standard via the communication unit, and a storage unit that stores data related to the tape cartridge.

A magnetic tape cartridge unit includes a plurality of magnetic tape cartridges stacked in a height direction. Each magnetic tape cartridge includes an antenna coil formed in a substrate, a communication circuit that communicates with a communicatee using power induced by application of a magnetic field from the communicatee to the antenna coil, and a case having a reference plane being a reference in a height direction. The substrate is inclined at an inclination angle of less than 45 degrees with respect to the reference plane. In a case where the plurality of magnetic tape cartridges are stacked in a predetermined orientation in the height direction, the reference planes of the plurality of magnetic tape cartridges are in parallel, and the inclination angles of the substrates relative to the reference planes and positions of the substrates in the reference planes conform among the plurality of magnetic tape cartridges.

Provided is a recording tape cartridge including: a case that accommodates a reel on which a recording tape is wound and includes a reference surface that serves as a reference in an axial direction of the reel in a case where the case is loaded into a drive device; a noncontact communication medium on which individual information is recorded, the noncontact communication medium being accommodated in the case and having a plate shape; a supporting portion that is formed in the case and supports one surface of the noncontact communication medium except for a lower end portion such that the noncontact communication medium is disposed while being inclined with respect to the reference surface at an angle of approximately 45 degrees; and a groove portion that is formed in the case and accommodates a portion of the lower end portion of the noncontact communication medium. The one surface of the lower end portion of the noncontact communication medium is not in contact with the case.

A cartridge memory used for a tape cartridge includes: a communication unit that communicates with a recording and reproducing device using a wireless communication method defined by an ISO 14443-2 standard which is a wireless communication standard; a non-volatile memory with a storage capacity exceeding 16 KB; and a control unit that writes or reads data to or from the non-volatile memory on a word-by-word basis (2 bytes at a time) or on a block-by-block basis (32 bytes at a time). The non-volatile memory includes a plurality of memory banks each having a storage capacity of 128 KB or less. The control unit writes or reads data defined by a magnetic tape standard to or from one or two or more first memory banks among the plurality of the memory banks, and writes or reads additional data to or from one or two or more second memory banks other than the first memory bank.

[Object] A cartridge memory according to an embodiment of the present technology is a cartridge memory for a recording medium cartridge, including: a memory unit; and a capacity setting unit. The memory unit has a memory capacity capable of storing management information relating to a second information recording medium configured to be capable of recording information with a second data track number larger than a first data track number. The capacity setting unit is configured to be capable of setting a data storage area limited to a first capacity capable of storing management information relating to a first information recording medium configured to be capable of recording information with the first data track number.

[Object] A cartridge memory according to an embodiment of the present technology is a cartridge memory for a recording medium cartridge, including: a memory unit; and a capacity setting unit. The memory unit has a memory capacity capable of storing management information relating to a second information recording medium configured to be capable of recording information with a second data track number larger than a first data track number. The capacity setting unit is configured to be capable of setting a data storage area limited to a first capacity capable of storing management information relating to a first information recording medium configured to be capable of recording information with the first data track number.

A cartridge memory used for a tape cartridge includes: a communication unit that communicates with a recording and reproducing device using a wireless communication method defined by an ISO 14443-2 standard which is a wireless communication standard; a non-volatile memory with a storage capacity exceeding 16 KB; and a control unit that writes or reads data to or from the non-volatile memory on a word-by-word basis (2 bytes at a time) or on a block-by-block basis (32 bytes at a time). The non-volatile memory includes a plurality of memory banks each having a storage capacity of 128 KB or less. The control unit writes or reads data defined by a magnetic tape standard to or from one or two or more first memory banks among the plurality of the memory banks, and writes or reads additional data to or from one or two or more second memory banks other than the first memory bank.

A non-contact communication medium according to one disclosed embodiment includes a memory unit, a power generation unit, a power monitoring unit, and a capacitance control unit. The power generation unit includes a resonant circuit and a rectification circuit, and generates electric power to be supplied to the memory unit. The resonant circuit includes an antenna coil and resonant capacitance unit having a variable capacitance value, and the rectification circuit rectifies a resonant output of the resonant circuit. The power monitoring unit includes a current adjustment element, a reference voltage generation source, and an operational amplifier. The operational amplifier controls the current adjustment element such that an output voltage of the rectification circuit is equal to a reference voltage from the reference voltage generation source. The capacitance control unit is configured to control the resonant capacitance unit on the basis of an output of the operational amplifier.

[Object] A cartridge memory according to an embodiment of the present technology is a cartridge memory for a recording medium cartridge, including: a memory unit; and a capacity setting unit. The memory unit has a memory capacity capable of storing management information relating to a second information recording medium configured to be capable of recording information with a second data track number larger than a first data track number. The capacity setting unit is configured to be capable of setting a data storage area limited to a first capacity capable of storing management information relating to a first information recording medium configured to be capable of recording information with the first data track number.