1. Installing Internal Optional Devices
Express5800/R120h-2M (3rd-Gen) User’s Guide
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Chapter 2 Preparations
Memory functions
This server is equipped with the "Advanced ECC function", "Memory ADDDC function", "Memory Mirroring
function", and "Memory Sparing function" as memory RAS functions.
The "Advanced ECC function" corrects memory errors to continue operation when errors occur on the same
DRAM device on the DIMM.
When the "Memory ADDDC function" is used, the server can correct memory errors to continue operation when
errors occur on multiple DRAM devices on the DIMM. This provides more protection against uncorrectable
memory errors than provided by Advanced ECC.
The "Memory Mirroring function" and "Memory Sparing function" create redundancy by monitoring and switching
memory between memory channels. These functions are described on the following pages.
Memory RAS functions supported vary depending on the memory installed. Refer to the table below.
N Code
Advance ECC
Function
Memory ADDDC
Function
Memory Mirroring
Function
Memory Sparing
Function
N8102-720
- -
N8102-721
(x4 SDDC)*1
-
N8102-722
-
N8102-723
(x4 SDDC)*1
N8102-724
(x4 SDDC)*1
N8102-725
(x4 SDDC)*1
N8102-726
(x4 SDDC)*1
*1 The Single Device Data Correction (SDDC) function automatically corrects data when one of the memory
chips of a DIMM fails.
The motherboard of this device has six separate "memory channels" for controlling memory.