7.8
Memory Problems
Table 7–8 Troubleshooting Memory Problems
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 7–1.
DIMMs may not have ECC bits.
Some third-party DIMMs may not be compatible
with
AlphaServer
TS15 systems. Ensure that
memory 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 memory DIMMs are qualified.
Example 7–1 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)
7-10
hp AlphaServer TS15 Owner's Guide
