A magnetic tape cartridge includes a case that houses a magnetic tape and has an opening, a door that is provided in the case and closes the opening, and a fixing portion that fixes the door to the case.

An apparatus includes a tape cartridge housing, an RFID chip attached to the tape cartridge housing. The RFID chip includes a tape cartridge ID and tape cartridge information, a time relay operably connected to the RFID chip, and external contact points configured to contact another RFID chip of another tape cartridge within the same tier. A method includes receiving a tape cartridge label read request including a position indicator corresponding to a location of a tape cartridge of interest, moving a tape cartridge gripper to the location indicated by the position indicator, activating a field coil on the tape cartridge gripper to provide power to an RFID chip on a selected tape cartridge, detecting information transmitted by the RFID chip on the selected tape cartridge, determining if the selected tape cartridge is the tape cartridge of interest, and activating a next RFID chip on an adjacent tape cartridge.

A magnetic tape cartridge includes a case that houses a magnetic tape and has an opening, a door that is provided in the case and closes the opening, and a fixing portion that fixes the door to the case.

A magnetic tape cartridge includes: a magnetic tape on which data is recorded; and a recording medium other than the magnetic tape, and on which a keyword for searching the data recorded on the magnetic tape is recorded.

A cartridge is provided and includes tape-shaped magnetic recording medium; and cartridge memory; wherein cartridge memory includes communication unit that communicates with recording/reproducing device in state where cartridge is loaded on recording/reproducing device; storage unit; and control unit that stores, reads, and transmits information, wherein information includes manufacturing information of cartridge and adjustment information for adjusting a tension applied to the tape-shaped magnetic recording medium in a longitudinal direction of tape-shaped magnetic recording medium thereof, tape-shaped magnetic recording medium has a plurality of servo bands, and wherein a temperature expansion coefficient α of the tape-shaped magnetic recording medium satisfies 6 ppm/° C.≤α≤8 ppm/° C.

A tape reel according to an embodiment of the present technology includes: a cylindrical reel hub that includes an outer periphery portion, a tape being wound on the reel hub. The reel hub is formed of a material in which a deformation amount when a load of 300 N is applied radially inward to an axial center of the outer periphery portion is 0.3 mm or less and a water absorption rate is 0.1% or less.

A cartridge is provided and includes tape-shaped magnetic recording medium; and cartridge memory; wherein cartridge memory includes communication unit that communicates with recording/reproducing device in state where cartridge is loaded on recording/reproducing device; storage unit; and control unit that stores, reads, and transmits information, wherein information includes manufacturing information of cartridge and adjustment information for adjusting a tension applied to the tape-shaped magnetic recording medium in a longitudinal direction of tape-shaped magnetic recording medium thereof, tape-shaped magnetic recording medium has a plurality of servo bands, and wherein a temperature expansion coefficient α of the tape-shaped magnetic recording medium satisfies 6 ppm/° C.≤α≤8 ppm/° C.

Provided is a recording tape cartridge including: a case that is configured by causing a peripheral wall of an upper case and a peripheral wall of a lower case to abut against each other and accommodates a reel on which a recording tape is wound; a reference surface that is formed on the lower case and 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 lower case and having a plate shape; a supporting portion that is formed on the lower case and supports the noncontact communication medium such that the noncontact communication medium is disposed while being inclined with respect to the reference surface at an angle of approximately 45 degrees; a position restricting portion that is formed on the lower case and restricts a position of a lower end portion of the noncontact communication medium; and a retaining portion that is formed on the lower case and retains an upper end portion of the noncontact communication medium.

A package includes a magnetic tape cartridge that has a case with an identifier displayed on a front surface, a storage member that has an opening portion, through which the magnetic tape cartridge is put in and out, and in which the magnetic tape cartridge is stored in a state in which the identifier is readable, and a packaging member that covers at least the opening portion of the storage member.

A magnetic tape cartridge including: a magnetic tape; and a recording medium including a predetermined area for recording defect information, which is information regarding a defect of the magnetic tape detected in a production process of the magnetic tape. A recording device, a recording method, a data recording and reproducing system, and a data recording and reproducing method are also provided.