Recording medium, adapter, and information processing apparatus

An adapter in which a recording medium is inserted and removed, the recording medium including multiple recording units, a local bus, an information storage and a communication bus, the local bus including a plurality of switches or bridges, the local bus distributed into a number of buses such that the multiple recording units connect to the adapter via the plurality of switches or bridges, the information storage stores information indicating a bus configuration of the local bus, the bus configuration includes the number of buses, and the communication bus being different from the local bus and configured to transfer the information to the adapter, the adapter comprising:

• a processor configured to:
• set a bus number from a root bus for each of the plurality of switches or bridges to construct a bus configuration, and
• acquire the information indicating the bus configuration from the information storage via the communication bus;
• and
• a detector configured to detect insertion and removal of the recording medium to and from the adapter;
• wherein, after insertion of the recording medium is detected by the detector, the processor configured to set a subordinate bus number of each of the plurality of switches or bridges based on the information indicating the bus configuration acquired via the communication bus including setting the subordinate bus number to the number of buses, and then reconstruct the bus configuration.