Patent ID: 11966596
Assignee: MITAC COMPUTING TECHNOLOGY CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 0:
1. A method of power management to be implemented by a storage system, the storage system being electrically connected to a server host, and including an expander, a processing unit and a power supply, each of the expander and the power supply being operable in one of a normal state and a power-saving state, the power supply only outputting operation electricity in the normal state and only outputting standby electricity in the power-saving state, a voltage of the standby electricity being lower than a voltage of the operation electricity, said method comprising steps of:
in response to receiving from the server host a sleep command for making the storage system switch from a normal mode to a power-saving mode, the expander first outputting, in the normal state, a predetermined register value to the processing unit;
after outputting the predetermined register value, the expander then operating in the power-saving state and outputting, in the power-saving state, an interrupt signal to the processing unit;
the processing unit determining whether both the predetermined register value and the interrupt signal are received; and
when it is determined that both the predetermined register value and the interrupt signal have been received, the processing unit controlling the power supply to operate in the power-saving state to output the standby electricity, making the expander and the processing unit operate based on the standby electricity.