It is an object of the present technology to provide a magnetic recording medium that has a small total thickness and achieves excellent travelling stability.

The present technology provides a tape-shaped magnetic recording medium including a magnetic layer, an underlayer, a base layer, and a back layer, in which a servo pattern is recorded in the magnetic layer, a statistical value σ.sub.SW indicating non-linearity of a servo band and being obtained from a reproduction waveform of a servo signal of the servo pattern is 24 nm or less, the base layer contains polyester as a main component, an average thickness t.sub.T of the magnetic recording medium is 5.6 μm or less, the magnetic recording medium contains a lubricant, pores are formed in the magnetic recording medium, and an average diameter of the pores of the magnetic recording medium that is measured in a state where the lubricant has been removed from the magnetic recording medium and the magnetic recording medium has been dried, is 6 nm or more and 11 nm or less.

[Solving Means] 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 before data recording by the magnetic tape, the information being for adjusting, during data recording or during data reproduction by the magnetic tape, a width of the magnetic tape.

[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.

According to one embodiment, a disk device includes a housing, recording medium, a magnetic head, an internal wireless communication device, and an internal component. The housing has an internal space. The internal wireless communication device generates at least either of: an electric signal representing information to be written to the recording medium, the electric signal corresponding to light, a magnetic field, or an electric field generated by an external wireless communication device; and light, a magnetic field, or an electric field toward the external wireless communication device, the light, the magnetic field, or the electric field corresponding to an electric signal representing information read from the recording medium. The internal component in the internal space is electrically connected to the magnetic head, the internal component that communicates with an external component located outside the housing through the internal wireless communication device and the external wireless communication device.

According to one embodiment, a disk device includes a housing, recording medium, a magnetic head, an internal wireless communication device, and an internal component. The housing has an internal space. The internal wireless communication device generates at least either of: an electric signal representing information to be written to the recording medium, the electric signal corresponding to light, a magnetic field, or an electric field generated by an external wireless communication device; and light, a magnetic field, or an electric field toward the external wireless communication device, the light, the magnetic field, or the electric field corresponding to an electric signal representing information read from the recording medium. The internal component in the internal space is electrically connected to the magnetic head, the internal component that communicates with an external component located outside the housing through the internal wireless communication device and the external wireless communication device.

A recording medium cartridge according to an embodiment of the present technology includes: an information recording medium; a first cartridge memory; and a second cartridge memory. The first cartridge memory is capable of storing first information relating to the information recording medium, and includes a non-contact communication medium capable of reading/writing the first information via a first communication device disposed in a drive device. The second cartridge memory is capable of storing second information relating to the information recording medium, and is configured to be capable of reading the second information via a second communication device.

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.

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.

A recording medium cartridge according to an embodiment of the present technology includes: an information recording medium; a first cartridge memory; and a second cartridge memory. The first cartridge memory is capable of storing first information relating to the information recording medium, and includes a non-contact communication medium capable of reading/writing the first information via a first communication device disposed in a drive device. The second cartridge memory is capable of storing second information relating to the information recording medium, and is configured to be capable of reading the second information via a second communication device.