Storage device connected to a superior device and method of supplying power to the storage device

摘要

An OOB sequence monitoring unit detects that an OOB sequence carried out between a base device as a superior device and a connection I/F which operates even if an extension device is in a standby state has proceeded to a given stage. Based on the detection by the OOB sequence monitoring unit, a power supply control unit instructs a starting power supply unit to supply power. When the extension device starts, the OOB sequence is carried out between the extension device and the connection I/F of another extension device in the same manner. As a result, extension devices are started in decreasing order from the extension device closest to the superior device.

主权项

1. A storage device being connectable to a superior device via an interface that sends and receives data being read and written to a storage media, the storage device comprising:
a power supply unit that supplies power for starting the storage device; and a control device, mounted in the storage device, that includes
a communication control unit that executes an OOB sequence including a processing which exchanges information to confirm a presence or recognize a type of the interface from the superior device;a detecting unit that detects an execution condition of the OOB sequence executed by the control device;a power supply instructing unit that instructs the power supply unit to supply power for starting the storage device, based on the execution condition of the OOB sequence;a link-down detecting unit that detects link-down at ports used by the interface for communication with the superior device; anda second detection suspending unit that when receiving a prescribed command from the superior device, suspends detection by the link-down detecting unit.