Patent ID: 8127165

Claim:
A method of controlling power, comprising: communicating, by a first server, with a storage unit associated with a logical unit number (LUN) via at least a first I/O port and a second I/O port; communicating, by a second server, with the storage unit associated with the LUN via at least a third I/O port and a fourth I/O port; determining that a usage indicator associated with at least said first I/O port and said second I/O port satisfies a first usage criteria, the usage indicator based on a current I/O load and a current active I/O port bandwidth; in response to said usage indicator satisfying said first usage criteria, determining that said first I/O port may be deactivated by ensuring that after said first I/O port is deactivated, said LUN will still have at least one data path to each of said first server and said second server; and, deactivating said first I/O port by placing said first I/O port in a power saving mode.