Apple Xserve Up Mac OS X Server User Manual download pdf (Page 44)

44 Appendix Server Diagnostics Test Reference

Server Diagnostics EFI Tests

These tests are available if your server is running Server Diagnostics EFI.

Startup Tests

These tests run automatically when you start up Server Diagnostics EFI.

SMBIOS tests check to see if bad memory was detected and mapped out at server

startup. When the server tests memory at startup, it automatically maps out

bad memory. Mac OS X doesn’t see this mapped-out memory, so the non-SMBIOS

memory tests don’t test it. The SMBIOS test reports these mapped-out DIMMS.

When an ECC error occurs, memory catches the problem and and xes it. When you

run other memory tests, the tests don’t realize an error has occurred. The ECC tests

detect these memory xes and report them.

Test Estimated completion time Description

Hardware Existence 1 second Compares a table of sensors and

fans with what’s connected to

the logic board. If a sensor or

fan isn’t found, an error occurs.

All sensors found can be

individually tested using sensor

tests.

SMBIOS Self-Test 1 second Checks the SMBIOS tables for

32-bit errors (type 18) and 64-

bit errors (type 33). Also veries

that the mapped-in DIMM size

is appropriate for the slot it’s

inserted into. If there’s a size

mismatch, an error occurs.

ECC Error Count 1 second Reports the number of ECC

errors, and then resets the

count.

AirPort Tests

Test Estimated completion time Description

PCI-E LinkWidth Verication 1 second Veries PCI link width is as

expected.

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Apple Xserve Up Mac OS X Server User Manual Page 44