Pci Bus Problems; Table 2-7 Pci Troubleshooting - Digital Equipment 3300R Service Manual

PCI Bus Problems

PCI bus failures at power-up are usually indicated by the inability of the system to see the
device. Table 2-7 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 PCI Parity
Checking option on the Advanced CMOS Setup Menu for the AlphaBIOS
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. The default setting is off, no parity checking.

Table 2-7 PCI Troubleshooting

Step
1
2
3
4
Action
Confirm that the PCI module and cabling are properly seated.
Run ROM-based diagnostics for the type of option:
•
Storage adapter—Run test to exercise the storage devices off the
PCI controller option (Chapter 3).
•
Ethernet adapter—Run test to exercise an Ethernet adapter
(Chapter 3).
Check for a bad slot by moving the last installed controller to a different
slot.
Call the option manufacturer or support for help.
Power-Up Diagnostics and Display
DIGITAL Server 3300/3300R 2–19