Error Messages; Ram Test Group; Subtests - Dell PowerEdge 6350 Installation And Troubleshooting Manual

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,
"Getting Help"; also see Chapter 12 for instructions on obtaining technical assistance
and for informing the technical assistance representative of these messages.
The RAM Test group subtests check all the directly addressable RAM.
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:
— 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
— A parity check that verifies the ability of the memory subsystem to detect
errors
— 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 con-
troller chip and the cache memory.
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:
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.)
The computer periodically locks up (becomes unusable and must be rebooted),
especially at different places and times in different programs.
Running the Dell Diagnostics 5-13