User`s guide

2.6 PCI Bus Problems Indicated at Power-Up
PCI bus failures at power-up are usually indicated by the inability of the system
to see the device. Table 2–6 provides steps for troubleshooting PCI bus problems.
Use the table to diagnose the likely cause of the problem.
Note
Some PCI devices do not implement PCI parity, and some have a parity-
generating scheme in which parity is sometimes incorrect or is not
compliant with the PCI Specification. In such cases, the device functions
properly as long as parity is not checked. The pci_parity environment
variable for the SRM console, or the DISABLEPCIPARITY CHECKING
for the ARC console, allow you to turn off parity checking so that false
PCI parity errors do not result in machine check errors.
When you disable PCI parity, no parity checking is implemented for any
PCI device, even those devices that produce correct, compliant parity.
Table 2–6 PCI Troubleshooting
Step Action
1 Confirm that the PCI module and any cabling are properly seated.
2 Run ROM-based diagnostics for the type of option:
• Storage adapter—Run test to exercise the storage devices off the PCI
controller option (Section 3.3.1).
• Ethernet adapter—Run netew or network to exercise an Ethernet adapter
(Section 3.3.4, Section 3.3.5).
3 Check for a bad slot by moving the last installed controller to a different slot.
4 Call the option manufacturer or support for help.
2–16 Power-Up Diagnostics and Display