Patent ID: 8327166
Filing Date: 2012-12-04
Classification: G06F,Y02D

Abstract:
1. A method operable in a system comprising a Serial Attached SCSI (SAS) target, a SAS expander communicatively coupled with the target, and a SAS initiator communicatively coupled with the expander, the method comprising: transmitting a power request message from the target through the expander to the initiator; receiving the power request message at the initiator; transmitting a power request received message from the initiator to the expander responsive to receiving the power request message; determining, within the expander, whether an additional power capacity is available to fulfill power requested by the target; allocating, within the expander, an additional power amount to the target responsive to receiving the power request received message and responsive to determining that the additional power capacity is available; and transmitting a power grant message from the expander to the target responsive to receiving the power request received message and responsive to determining that the additional power capacity is available.