Upgrading Your Server 9-31Memory MirroringThe memory mirroring feature writes the same data into two groups of DIMMs corresponding witheach other between memory branches (mirror set) to provide data redundancy.Mother boardMemory controllerBranch #0 Branch #1Group #1 Group #2Data1 Data1 Pair ofmirroring Group #1 Group #2Data2 Data2Data3Data4Data3Data4Pair ofmirroring Group #3 Group #4Pair ofmirroring Group #5 Group #6NOTE: The operating system only recognizes a half of the totalphysical capacity.The memory mirroring feature can be used under the following conditions: Install memory devices on four memory sockets configuring a mirror set. All the installed memory devices should have the same capacity. Run SETUP (see Chapter 4), change parameters appropriately in the [Mirror] menuselected as shown below, save the settings and exit from SETUP.[Advanced] → [Memory Configuration] → [Memory RAS Feature] → [Mirror] Install memory devices in the following order:Groups 1 and 2 → Groups 3 and 4 → Groups 5 and 6The following mirroring cannot be configured: Memory mirroring between different mirror sets Memory mirroring within a specific memory branch
