Dell PowerEdge 4350 Dell PowerEdge 4350 Systems Installation and Troubleshooti - Page 61

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Match case Limit results 1 per page

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100% Actual Size Fit Width Fit Height Fit Page Automatic

Running the Dell Diagnostics 5-13

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When you run a test group or subtest in the diagnostics, error messages may result.

These particular error messages are not covered in this chapter because the errors

that generate these messages can be resolved only with Dell technical assistance.

Record the messages on a copy of the Diagnostics Checklist found in Chapter 12,

²Getting Help³; also see Chapter 12 for instructions on obtaining technical assistance

and for informing the technical assistance representative of these messages.

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The RAM test group subtests check all the directly addressable RAM.

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Three subtests are available for RAM: the Quick Memory Test, the Comprehensive

Memory Test, and the Cache Memory Test. The Quick Memory Test performs an

address check to determine whether the computer is properly setting and clearing

individual bits in RAM and whether the RAM read and write operations are affecting

more than one memory address location at one time. This subtest checks all available

RAM.

The Comprehensive Memory Test performs an address check as well as the following

checks:

²

Data pattern checks, to look for RAM bits that are stuck high or low, short-

circuited data lines, and some data pattern problems that are internal to the

memory chips

²

A parity check that verifies the ability of the memory subsystem to detect errors

²

A refresh check, to verify that the dynamic RAM (DRAM) is being recharged

properly

The Cache Memory Test confirms the functionality of the computer±s cache controller

chip and the cache memory.

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Faulty memory can cause a variety of problems that may not appear to be happening

in RAM. If the computer is displaying one or more of the following symptoms, run the

subtests in the RAM test group to verify that the memory is not at fault:

²

A program is not running as usual, or a proven piece of software appears to mal-

function and you confirm that the software itself is not at fault. (You can confirm

that the software is functioning properly by moving it to another computer and

running it there.)

²

The computer periodically locks up (becomes unusable and must be rebooted),

especially at different places and times in different programs.

²

You get a parity error (any error message that contains the word parity) at any

time during operation. These errors are usually accompanied by a reference to an