DEVICE DRIVER ERROR ISOLATION ON DEVICES WIRED VIA FSI CHAINED INTERFACE

Fault isolation for a computer system having multiple FRUs in an FSI chain uses logic embedded in a device driver to determine first failure data and a logical error identifier. The logical error identifier represents a hardware logical area of the fault. The fault is then mapped to a segment of the system based on a self-describing system model which includes FRU boundary relationships for the devices. Operation of the device driver is carried out by a flexible service processor. The device driver uses the first failure data to identify a link at a failure point corresponding to the fault and determine a failure type at the link, then maps the link and the failure type to the logical error identifier. After identifying the segment, the device driver can generate a list of callouts of the field replaceable units associated with the segment which require replacement.