IBM 72332MU Installation Guide - Page 72

Memory problems, If an action step is preceded by Trained service technician only

Get IBM 72332MU - System x3950 M2 PDF manuals and user guides
UPC - 883436084673
View all IBM 72332MU manuals
Add to My Manuals
Save this manual to your list of manuals

Page 72 highlights

Memory problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Symptom Action The amount of system memory 1. Make sure that: that is displayed is less than the amount of installed physical memory. v No error LEDs are lit on the operator information panel or on the memory card. v Memory mirroring does not account for the discrepancy. v Scalability does not account for the discrepancy. Note: Each node in a multi-node configuration uses 256 MB of system memory. v The memory modules are seated correctly. v You have installed the correct type of memory. v If you changed the memory, you updated the memory configuration in the Configuration/Setup Utility program. v All banks of memory are enabled. The server might have automatically disabled a memory bank when it detected a problem, or a memory bank might have been manually disabled. 2. Check the POST error log for error message 289. If a DIMM was disabled, run the Configuration/Setup Utility program and enable the DIMM. 3. Run memory diagnostics. 4. Make sure that there is no memory mismatch when the server is at the minimum memory configuration (two 1 GB DIMMs). 5. Reinstall the removed DIMMs one pair at a time, making sure that the DIMMs in each pair match. 6. Reinstall the removed memory cards one memory card at a time, making sure that the DIMMs on each card match. 7. Reseat the following components: a. DIMM b. Memory card 8. Replace the components listed in step 7 one at a time, in the order shown, restarting the server each time. 60 IBM System x3850 M2 and System x3950 M2 Types 7141 and 7233: Installation Guide

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
Memory problems
v
Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See the parts listing in the
Problem Determination and Service Guide
to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v
If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Symptom
Action
The amount of system memory
that is displayed is less than the
amount of installed physical
memory.
1.
Make sure that:
v
No error LEDs are lit on the operator information panel or on the memory
card.
v
Memory mirroring does not account for the discrepancy.
v
Scalability does not account for the discrepancy.
Note:
Each node in a multi-node configuration uses 256 MB of system
memory.
v
The memory modules are seated correctly.
v
You have installed the correct type of memory.
v
If you changed the memory, you updated the memory configuration in the
Configuration/Setup Utility program.
v
All banks of memory are enabled. The server might have automatically
disabled a memory bank when it detected a problem, or a memory bank
might have been manually disabled.
2.
Check the POST error log for error message 289. If a DIMM was disabled, run
the Configuration/Setup Utility program and enable the DIMM.
3.
Run memory diagnostics.
4.
Make sure that there is no memory mismatch when the server is at the
minimum memory configuration (two 1 GB DIMMs).
5.
Reinstall the removed DIMMs one pair at a time, making sure that the DIMMs
in each pair match.
6.
Reinstall the removed memory cards one memory card at a time, making sure
that the DIMMs on each card match.
7.
Reseat the following components:
a.
DIMM
b.
Memory card
8.
Replace the components listed in step 7 one at a time, in the order shown,
restarting the server each time.
60
IBM System x3850 M2 and System x3950 M2 Types 7141 and 7233: Installation Guide