International Business Machines Corporation

Scott Douglas Walton

David R Willoughby

Richard Louis Arndt

Alongkorn Kitamorn

Edward John Silha

David Lee Randall

Bradley Ryan Harrington

EEH methods are used during the boot process to actively disable a defective PCI adapter, thereby allowing the system boot to continue without disruption. This allows faulty adapters to be present in the machine without interrupting the boot process. The slots appear to be empty and the devices/adapters residing therein can be actively 'hot swapped' out without altering the rest of the machine state.

Initializing a processing system to ensure fail-safe boot when faulty PCI adapters are present

A method, apparatus, and computer implemented instructions for processing and recovering from soft errors in computer array with a parity error checking design in a data processing system. In response to an occurrence of a parity error, processor status information is stored to form stored processor information. A determination is made as to whether the parity error is a recoverable parity error using the stored processor information. In response to the parity error being a recoverable parity error, a recovery action is performed. The specific action taken varies depending on the type of error.

Method and apparatus for parity error recovery

A method and system is provided for a computer system for testing base memory in which the computer system's operating system resides. The operating system is initially run out of the base memory in a first memory bank. A mapping scheme establishes a correspondence between physical addresses in the first memory bank and in a second memory bank, and logical addresses which map to the physical addresses in the first and second memory banks. The contents of the base memory from the first memory bank are copied to the second memory bank, and operation of the operating system from the base memory in the first memory bank is switched to the base memory copied into the second memory bank. After a memory test is performed on the first memory bank, the copied contents of the base memory are re-copied from the second memory bank back into the first memory bank, and operation of the operating system is switched back to the re-copied base memory in the first memory bank.

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Pflugerville, TX, United States of America

Scott Douglas Walton