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 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 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 includes a case on which an identifier is displayed, and a storage medium in which reading condition information that is information regarding a condition for reading the identifier is stored.

A magnetic disk device includes a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall, a magnetic disk provided in the casing, a head configured to write data to the magnetic disk and to read data from the magnetic disk, an actuator assembly that supports the head in the casing, a conductive container on the first surface of the cover, and a conductive body in contact with the conductive container and the cover.

A magnetic disk device includes a casing having a box-like base that has a bottom wall and a cover that has a first surface facing the bottom wall, a magnetic disk provided in the casing, a head configured to write data to the magnetic disk and to read data from the magnetic disk, an actuator assembly that supports the head in the casing, a conductive container on the first surface of the cover, and a conductive body in contact with the conductive container and the cover.

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 recording tape cartridge includes two first guide wall portions formed in a direction orthogonal to a loading direction of the case into a drive device and between which a first protruding wall portion formed at a brake member is insertable, and two second guide wall portions and two third guide wall portions formed at regular intervals from the first guide wall portions in a circumferential direction. A second protruding wall portion at the brake member is insertable between the second guide wall portions, and a third protruding wall portion at the brake member is insertable between the third guide wall portions. An interval, , between each first guide wall portion and the first protruding wall portion, and an interval, , between each second guide wall portion and the second protruding wall portion and between each third guide wall portion and the third protruding wall portion satisfy 2.

A recording tape cartridge includes a set of two first guide wall portions formed in a direction orthogonal to a loading direction of the case into a drive device and between which a first protruding wall portion formed at a brake member is insertable, and a set of two second guide wall portions and a set of two third guide wall portions formed at regular intervals from the first guide wall portions in a circumferential direction. A second protruding wall portion at the brake member is insertable between the second guide wall portions, and the third protruding wall portion at the brake member is insertable between the third guide wall portions. An interval between the each first guide wall portion and the first protruding wall portion is denoted by and an interval between the each second guide wall portion and the second protruding wall portion and an interval between the each third guide wall portion and the third protruding wall portion is denoted by , 2 is satisfied.

A magnetic tape cartridge includes a case on which an identifier is displayed, and a storage medium in which reading condition information that is information regarding a condition for reading the identifier is stored. The magnetic tape cartridge can be part of a cartridge management system, a reading method, and a non-transitory storage medium storing a program.