Patent ID: 7107495

Claim:
A method in a logical partitioned data processing system for improving isolation of I/O errors in logical partitioned data processing systems, said method comprising the steps of: generating a machine check that indicates that an I/O error has occurred in an I/O slot; identifying one of a plurality of PCI host bridges (PHBS) that generated said machine check, said one of said plurality of PHBs supporting said I/O slot; each one of said plurality of PHBs being coupled to a different plurality of I/O slots; identifying ones of a first plurality of slots that are coupled to adapters that are not enabled for enhanced error handling, said first plurality of slots being coupled to said identified one of said plurality of PHBs; and determining that said I/O error occurred in one of said identified ones of said first plurality of slots, wherein said I/O slot is included in said identified ones of said first plurality of slots.