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Appendix AXD Tools Test Reference 37

Hard Drive Tests

Memory Tests

AXD Mac OS X memory tests test the first 2.5 GB of memory. All multicore memory

tests listed in AXD EFI tools are run.

Even though these memory tests don’t test all memory, run these tests to detect

intermittent memory issues.

After the first 2.5 GB of memory is tested, the memory test then tests for ECC errors.

When an ECC error occurs, memory catches the problem and fixes it. The test detects

the number of memory fixes and reports them.

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

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

MAC Data Loop 1 minute Verifies that there’s no data mismatch

between sent and received data while

looping within the MAC (a sublayer of

the datalink layer in the ISO network

reference model)

PHY Data Loop 1 minute Verifies that there’s no data mismatch

between sent and received data while

looping within the physical transport

medium (PHY)

Test Estimated completion time Description

Threaded Surface Scan 30 minutes for an 80 GB

drive; 4 hours for a 750 GB

drive

Scans the entire surface of a hard

drive

Check SMART Status Test 1 second Checks the SMART status of a hard

drive

Test Estimated completion time Description

Simple Test 12 minutes Runs all multicore memory tests listed

in AXD EFI tools, reports the number

of ECC errors, and then resets the

count

1 2 ... 32 33 34 35 36 37 38 39

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