A non-disruptive unassignment of an address from a fabric responsive to a request from a channel adapter. A logout command requests the fabric to unassign an address. The status of the address is thereby changed from active to unassigned and an acknowledgment sent back to the channel adapter....http://www.google.com.au/patents/US7676609?utm_source=gb-gplus-sharePatent US7676609 - Method and apparatus for non-disruptively unassigning an active address in a fabric
