Noncontact communication medium, magnetic tape cartridge, method for operating noncontact communication medium, and program

A method for operating a noncontact communication medium that includes a memory incorporated in or connected to a processor and performs noncontact communication with an external communication device,

• in which the memory has a storage block where information determined depending on a specification of a magnetic tape cartridge, in which the noncontact communication medium is mounted, is stored, and
• the storage block has an identifier storage field where an identifier capable of specifying the noncontact communication medium is stored,
• the method comprising:
• writing the identifier given from the external communication device to the noncontact communication medium by the noncontact communication in the identifier storage field;
• executing locking processing of locking the identifier storage field in response to a specific command given from the external communication device to the noncontact communication medium by the noncontact communication;
• and
• switching between on and off of a flag indicating permission of the locking processing in response to an external instruction.

A non-transitory computer-readable storage medium storing a program executable by a computer, which is applied to a noncontact communication medium that includes a memory incorporated in or connected to a processor and performs noncontact communication with an external communication device, to perform a process,

• in which the memory has a storage block where information determined depending on a specification of a magnetic tape cartridge, in which the noncontact communication medium is mounted, is stored, and
• the storage block has an identifier storage field where an identifier specifying the noncontact communication medium is stored,
• the process comprising:
• writing the identifier given from the external communication device to the noncontact communication medium by the noncontact communication in the identifier storage field;
• executing locking processing of locking the identifier storage field in response to a specific command given from the external communication device to the noncontact communication medium by the noncontact communication;
• and
• switching between on and off of a flag indicating permission of the locking processing in response to an external instruction.