Changer device, its confidentiality setting method, confidentiality cancellation method, execution command execution method, and computer sending command to the changer device

摘要

This is related to a changeable device capable of maintaining a security. The tape cassette is selectively supplied to the drives (102-l). The non-volatile memory 114 stores information regarding the confidentiality of the media racks, such as a plurality of storage units and drives. At the time of confidentiality setting, a command is supplied from the outside to the controller (110), and information about confidentiality, for example, a host ID, a pin number, a confidential level information, and information on a group of confidential elements are written into the memory (114). At the time of releasing the confidentiality, the controller 110 supplies a release command from the outside to erase information about the confidentiality from the memory 114. When executing commands from the host computer, the controller (110) controls its execution by referring to the information about confidentiality stored in memoryConfidentiality.