Upgrading Your Server 9-35Using the Memory RAS FeaturesThe server has RAS feature including "Standard memory configuration (x4 SDDC ECC memory)",a "memory mirroring feature", a "memory sparing feature", and a "LockStep (x8 SDDC ECCmemory) feature". SDDC (Single Device Data Correction) allows automatic correction of memoryerror (multi-bit error).IMPORTANT: To use the memory mirroring feature or LockStep (x8 SDDC ECCmemory) feature, an additional memory stick(N8102-387/388/389/390/391) is required. To use x4 SDDC ECC memory feature, an additional memory stick(N8102-371/372/373/374/375) is required.The memory area on the motherboard of the server is divided into two memory channels as shownin the figure below.Memory controller Memory controllerThe memory mirroring and LockStep features keep memory redundancy between memory channelsby monitoring or altering memory active/inactive status, respectively.
