Alpha 1000A Specifikace stáhnout pdf (Strana 171)

AlphaServer 1000A Owner's Guide Troubleshooting • 8-15

PCI Bus Problems

PCI bus problems at startup are usually indicated by the inability of the system to

detect the PCI device. Use Table 8-10 to diagnose the likely cause of the problem.

PCI Parity

Some PCI devices do not implement PCI parity, and some have a parity-generating

scheme that may not comply 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 allows you to turn off parity checking so that false PCI

parity errors do not result in machine check errors. The ARC environment variable,

ENABLEPCIPARITYCHECKING

, has a default setting of

FALSE

, so that parity is not

checked unless you change the value to

TRUE

. When PCI parity is disabled, no

parity checking is implemented for any PCI device, even those that produce correct,

compliant parity.

Table 8-10 Troubleshooting PCI Bus Problems

Step Action

1 Confirm that the option is supported, and confirm firmware and software

versions.

2 Confirm that the PCI module and any cabling are properly seated.

3 Check for a bad slot by moving the last installed controller to a different slot.

4 Call the option manufacturer or your service representative for help.

Monitor and Terminal Problems

If the system starts up but has no startup display when you turn on the system, refer

to Table 8-11.

1 2 ... 166 167 168 169 170 171 172 173 174 175 176 ... 217 218

Žádné komentáře

Alpha 1000A Specifikace Strana 171