9-58 Upgrading Your ServerMemory 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.NOTE: 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 branchMother boardMemory controllerBranch #0Group #1Pair ofmirroringBranch #1Pair ofmirroringPair ofmirroringGroup #3Group #5Group #2Group #4Group #6Data1Data2Data3Data4Data1Data2Data3Data4Group #1 Group #2
