Apple Xserve Up Mac OS X Server Bedienungsanleitung PDF herunterladen (Seite 47)

Appendix Server Diagnostics Test Reference 47

Multicore Memory Tests

Multicore memory tests test the rst 2.5 GB of memory using all available CPU cores.

In Server Diagnostics EFI, all memory tests (simple, multicore, and extended) are

grouped under Memory tests.

Note: The time required to complete memory tests correlates to the amount of

memory being tested. These estimates are based on testing 1 GB of memory.

Test Estimated completion time Description

MP Block Checkerboard 5 seconds Alternates 32-bit words with all

1s and all 0s, and then with all

0s and all 1s.

MP Bit Checkerboard 5 seconds Alternates bits with all 1s and

all 0s, and then with all 0s and

all 1s.

MP Sequential Byte Block 8 minutes Fills all bytes sequentially with

patterns starting at 0x00 and

ending at 0xFF.

MP Walking One 2 minutes Walks 1s up and down memory.

MP Walking Zero 4 minutes Walks 0s up and down memory.

MP Walking Spread Bit 4 minutes Walks 0b01 up and then walks

0b10 down memory.

MP Walking Bit Flip 4 minutes Alternates words with walking

1 and walking 0, and then

alternates words with walking 0

and walking 1.

Check Hardware Errors 1 second Tests specic registers for

memory related errors. Running

this test at the end of memory

testing may help catch memory

errors generated during other

memory tests.

Extended Memory Tests

Extended memory tests test all available memory.

In Server Diagnostics EFI, all memory tests (simple, multicore, and extended) are

grouped under Memory tests.

The availability of extended memory tests depends on the server model you test.

Note: The time required to complete memory tests correlates to the amount of

memory being tested. These estimates are based on testing 1 GB of memory.

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Apple Xserve Up Mac OS X Server Bedienungsanleitung Seite 47