HP Digital AlphaStation 255 Family Technical Information PDF herunterladen (Seite 56)

2.2.8 Memory Problems

Memory problems may affect system performance. Use the following table to

troubleshoot these problems.

Table 2–9 Memory Testing

Symptom Action

DIMMs ignored by system, or

system unstable. System hangs or

crashes.

Ensure that each memory array has identical DIMMs installed.

DIMMs failing memory power-

up self-test.

Replace the DIMMs that the SROM has isolated on power up.

See Example 2–1.

DIMMs may not have ECC bits. Some third-party DIMMs may not be compatible with DS15

systems. Ensure that the DIMMs are qualified.

Noticeable performance

degradation. The system may

appear hung or run very slowly.

This could be a result of hard single-bit ECC errors on a

particular DIMM. Check the error logs for memory errors.

Ensure that the memory DIMMs are qualified.

Example 2–1 Memory Sizing

Memory sizing in progress

Memory configuration in progress

Testing AAR2

Memory data test in progress

Memory data path error

ErrAdr: 00000000.00000000

Expect: 00000000.00000001

Actual: 00000000.00000000

XORval: 00000000.00000001

Testing AAR0

Memory data test in progress

Memory address test in progress

Memory pattern test in progress

Memory initialization

Failed DIMM 3

Loading console

Code execution complete (transfer control)

2-12 hp AlphaServer/AlphaStation DS15 Service Guide

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HP Digital AlphaStation 255 Family Technical Information Seite 56