Enhanced I/O Subsystem Failure Detection With Isolation and RECOVERY
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
In a multiprocessor computer system, where one processor acts as the master processor over secondary I/O subsystem processor(s), the master processor must periodically verify that the I/O subsystem processors are still functioning. In addition, the master processor may need to isolate a failing I/O subsystem processor until its function can be recovered and verified. Here, a method by which a master processor can monitor, isolate, and recover I/O subsystem processor function is described.