1. Installing Internal Optional Devices
Express5800/T120h User’s Guide
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Chapter 2 Preparations
Memory Function
As the memory RAS function, the device has "Advanced ECC Function (x4 SDDC)", "Memory ADDDC
Function" , "Memory Mirroring Function" and "Memory Sparing Function."
Single Device Data Correction (SDDC) is a function to restore data automatically in case one of memory chips
stored on DIMM breaks.
"Memory ADDDC function" of this device allows the correction of memory errors and continuation the operation
even whilst failures occur in multiple DRAM devices on the DIMM. This provides protection against
uncorrectable memory errors beyond those available in Advanced ECC.
The mother board of this device has six systems of "Memory Channel" to control memories.
"Memory Mirroring Function" and "Memory Sparing Function" are functions to keep redundancy by executing
the monitoring of memory and switching among memory channels.
