VMware vSphere 5 On Dell PowerEdge Systems Deployment Guide

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% of system memory may be consumed to provide the FRM zone in 12th generation of PowerEdge systems and 12.5% of system memory may be consumed to provide FRM zone in 13th generation of PowerEdge Systems.

FRM is a Memory Operating mode available on the BIOS settings of few Dell’s 12th generation of PowerEdge systems and later. This mode establishes an area of memory that is fault resilient and protects the hypervisor against usually uncorrectable memory errors. 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.