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
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
38
Appendix
AXD Tools Test Reference