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40 Appendix Server Diagnostics Test Reference
Hard Drive Tests
When Server Diagnostics EFI starts, it performs a hardware existence test. Hard drives
found during this test can be tested individually using hard drive tests.
Test Estimated completion time Description
Full Read 3 hours for a 1 TB drive Performs a DMA full-read scan
at 1250 RPM. This checks the
entire hard drive for slow-read
failures.
This test is available for hard
drives, but not solid-state drives.
Abbreviated Read 2 minutes Performs a DMA scan at 1250
RPM. This checks the rst 10 GB
of the hard drive for slow-read
failures.
This test is available for hard
drives, but not solid-state drives.
Check SMART Status 1 second Check the SMART status of
a hard drive.
This test is available for hard
drives, but not solid-state drives.
Memory Tests
Simple Memory Tests
In Server Diagnostics EFI, 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 8 GB of memory.
Test Estimated completion time Description
Address as Data 15 seconds Tests memory using the
memory address as data.
Patterns 40 seconds Tests memory using dierent
data patterns.
Marching Ones and Zeros 30 seconds Tests memory by walking 1s and
0s up and down memory.
Knaizuk Hartmann 20 seconds Tests memory using this
algorithm.
MOD3 1 minute Tests memory using this
algorithm.
March U 3 minutes Tests memory using Van de
Goor’s March U algorithm.