A mechanism for establishing a logical relationship between a channel and a control unit, called a logical channel path, in a computer input/output system wherein a dynamic switch is provided between the channel and the control unit. The disclosed logical path mechanism provides for the sharing of the...http://www.google.ca/patents/US5420988?utm_source=gb-gplus-sharePatent US5420988 - Establishing logical paths through a switch between channels and control units in a computer I/O system
