1. Installing Internal Optional Devices
Express5800/B120f User's Guide
49
Chapter 2 Preparations
1.5.3
Removal
To remove DIMMs, first remove the top cover, air duct, and hard disk drive cage referring to
Chapter 2 (1.3.1
Removal of top cover, 1.3.2 Removal of air duct, and 1.3.3 Removal of hard disk
, and then
perform
steps in
Chapter 2 (1.5.2 Installation
) in reverse order.
After DIMMs are removed, make sure that no error message appears in POST.
If any error messages are displayed, refer to
Chapter 3 (1. Error Message of POST and Virtual LCD)
in
"
Maintenance Guide
".
Run SETUP and select
Yes
after selecting
Advanced
→
Memory Configuration
→
Memory Retest
. Restart
the CPU blade to clear the error information of the removed DIMM. (Refer to
Chapter 2 (1. System BIOS)
in
"
Maintenance Guide
".)
Set the paging file size to a value larger than the recommended value (installed memory * 1.5) (for Windows).
Refer to the
Installation Guide
for more information.
Note
To remove the defective DIMM, check the error message appearing in POST or NEC
ESMPRO to confirm the CPU blade on which the defective DIMM is installed.
1.5.4
Using Memory RAS Feature
This server has RAS feature including Standard Memory feature (x4 SDDC), Memory Mirroring feature, Memory
Lock Step (x8 SDDC), and Memory Sparing feature.
SDDC (Single Device Correction) allows automatic correction of memory error (multi-bit error).
Note
Only the features that support additional memory board can be used.
The memory area on the motherboard of the server is divided into three memory channels.
Memory Mirroring, Memory Lock Step, and Memory Sparing features keep memory redundancy between
memory channels by monitoring or altering memory active/inactive status, respectively.
CH2
CPU1
Memory Controller
CPU1-DIMM4
CH3
CH1
CPU1-DIMM1
CPU1-DIMM2
CPU1-DIMM3
CPU1-DIMM5
CPU1-DIMM6
CH2
CPU2
1
Memory Controller
CPU2-DIMM4
CH3
CH1
CPU2-DIMM1
CPU2-DIMM2
CPU2-DIMM3
CPU2-DIMM5
CPU2-DIMM6
