A medium processing system for use with an information recording medium is disclosed. The system may include a first medium processing apparatus, a host apparatus, and a second medium processing apparatus. The first medium processing apparatus may be structured to carry out writing and reading information to and from the information recording medium. The host apparatus may have an interface with which the first medium process apparatus is connectable. The second medium processing apparatus may be structured to intermediate a connection between the first medium processing apparatus and the host apparatus. The second medium processing apparatus may also be structured to carry out writing and reading information to and from the information recording medium at a higher speed than the first medium processing apparatus does.