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VMware vSphere ESXi 6.x on Dell EMC PowerEdge Systems Installation Instructions and Important Information Guide

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Overview - Dell Fault Resilient Memory

CAUTION: Do not attempt to enable Fault Resilient Memory (FRM) on vSphere versions earlier than VMware ESXi 5.5. Up to 25 percent of system memory may be consumed to provide the FRM zone in 12th generation of the PowerEdge servers and 12.5 percent of system memory may be consumed to provide FRM zone in 13th Generation of the Dell PowerEdge servers.

FRM is a Memory Operating mode available on the BIOS settings of high-end 12th generation Dell PowerEdge servers and later. This mode establishes an area of memory that is fault resilient and protects the hypervisor against uncorrectable memory errors, the system stops responding. Systems with ESXi that supports the FRM feature can load the operating system kernel to maximize system availability and/or critical applications or services. VMWare ESXi version 5.5 update 2 and later supports FRM through its Reliable Memory (ReM) technology.

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