Abstract: A system and method for logging and restoring the state of execution of resource transactions in a shared system resource by logging and restoration of state machine information. Each state machine logging mechanism includes a state machine log generator for extracting state machine information and generating and storing a state machine log. The resource may include dual, concurrently operating control/processing subsystems and may include corresponding functionally integral but physically separate state machine log mirroring mechanisms for receiving and restoring mirror copies of the state machine information.

Abstract: A high level transaction logging mechanism for use in a shared system resource, such as a file server, and a high level, cross server transaction mirror logging mechanism. A system resource includes first and second blade processors, each including a first processor transforming high level operations into corresponding low level operations and a transaction logging mechanism including a log generator for extracting high level operation information relating to each system resource request and a transaction log for storing the high level operation information. The logging mechanism is responsive to restoration of operation of the system resource for reading the high level operation information from the transaction log and restoring the state of execution of the first processor.