LOGIC CHANNEL PATH MECHANISM IN COMPUTER INPUT/OUTPUT DEVICE AND METHOD OF ESTABLISHING LOGIC CHANNEL PATH THEREOF

摘要

PURPOSE: To obtain a mechanism for establishing logic relation between a channel and a controller in a computer I/O system including a dynamic channel switching mechanism between the channel and the controller. CONSTITUTION: The I/O system includes the dynamic channel switching mechanism 10 having many ports P respectively connected to one ends of respective links 12 to 18. The link 18 is connected to a dynamic channel switching mechanism controller 20, which is connected to a channel A 22, a channel B 24 or any one of controllers 26 to 29 and respective peripheral devices D30, D33 are controlled by the controllers 26, 29. In the logical route mechanism, the same physical route to one or more controllers can be shared by one or more channels.