Apple Server Diagnostics Manual de usuario descargar pdf (Pagina 52)

52 Appendix Server Diagnostics Test Reference

Fan Tests

When Server Diagnostics Mac OS X starts, it performs a hardware existence test. All

fans found during this test can be tested individually using fan tests.

Test Estimated completion time Description

Verify Motor +/– 10%, 10 Reads

High, 20 Low

2 minutes Veries the minimum and

maximum fan speeds. Sets the

minimum and maximum builds

within 10% of the threshold and

then does 10 consecutive reads

at the maximum and 20 at the

minimum.

Verify Motor Automatically

+/– 15%

2 minutes Veries the minimum and

maximum fan speeds. Sets the

minimum and maximum builds

within 15% of the threshold.

Hard Drive Tests

When Server Diagnostics Mac OS X starts, it performs a hardware existence test. All

hard drives and solid-state drives found during this test can be tested individually

using hard drive tests.

Test Estimated completion time Description

Threaded Surface Scan 2 hours for an 500 GB drive;

3 hours for a 1 TB drive

Scans the entire surface of a

hard drive.

Threaded Surface Short Scan 3 minutes Scans the rst 10 GB of a hard

drive.

Check SMART Status 1 second Checks the SMART status of a

hard drive.

Short Random Multi-block 7 minutes Performs a threaded, random

multi-block read of random

ranges of the target hard drive.

This isn’t a full surface scan,

but it causes rapid seeking and

reading of hard drive blocks. If

a block can’t be read, an error

occurs.

Memory Tests

All memory tests are categorized here.

Simple Memory Tests

Server Diagnostics Mac OS X memory tests test the rst 2.5 GB of memory. All

multicore memory tests listed in Server Diagnostics EFI are run.

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Apple Server Diagnostics Manual de usuario Pagina 52

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