Removal / Replacement; Using Memory Ras Feature - NEC Express5800 Series User Manual

Chapter 2 Preparations

Removal / Replacement

1.9.6
To remove DIMM, reverse the installation procedure.
Be sure to install dummy cover to the slots from where DIMMs are removed.
Follow the steps below after replacing or removing DIMMs.
1. Confirm that no error messages are displayed on POST. If any error message is displayed, see Chapter
3 (1. Post Error Message) in "Maintenance Guide".
2. Run BIOS Setup Utility, select Memory Configuration from the Advanced menu, and then specify Yes
for Memory Retest. After that, select Save Changes and Exit to reboot.
3. Set the size of Paging File to the recommended value (total memory size x 1.5) or more.
If using a Windows OS, see Chapter 1 (7.1 Specifying Memory Dump Settings (Debug Information)) in
"Installation Guide (Windows)".
For other OS, follow the manual of the OS.

Using Memory RAS Feature

1.9.7
This server has RAS feature including Standard Memory feature (x4 SDDC ECC memory), Memory Mirroring
feature, Memory Sparing feature, and Memory Lock Step (x8 SDDC ECC memory) feature. Single Device
Correction (SDDC) allows automatic correction of memory error (multi-bit error).
The memory area on the motherboard of the server is divided into four memory channels.
Memory controller
Memory Mirroring, Memory Lock Step, and Memory Sparing features keep memory redundancy between
memory channels by monitoring or altering memory active/inactive status, respectively.
Important
Failing to install dummy cover to vacant slot may cause malfunction of the
server due to insufficient cooling effect.
Note
When removing a defective DIMM, check error messages displayed at POST or
NEC ESMPRO and check the DIMM socket where the defective DIMM is installed.
Note
• See List of features supported by additional memory board in 1.9.3 Memory
RAS Feature before using memory RAS feature.
• Only the features that additional memory board supports can be used.
Express5800/R120f-1E User's Guide
1. Installing Internal Options
Memory controller
61