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19 | Dell PowerEdge Technical Guide

For information on memory mirroring and sparing configurations, see the

Dell PowerEdge R920

Owner’s Manual

on Dell.com/Support/Manuals.

Mirroring and Dell Fault Resilient Memory

The PowerEdge R920 supports memory mirroring. Partial mirroring is enabled through Dell Fault

Resilient Memory (FRM). Available on Dell PowerEdge 12th generation servers, FRM establishes an

area of memory that is fault resilient and can be used by an operating system supporting the FRM

feature to load critical applications and maximize system availability.

Benefits:

 Creates a highly resilient memory zone for the hypervisor, protecting it from all but the most

severe memory errors.

 With VMware

 , vSphere v5.5, FRM provide the hypervisor with strong protection from memory faults that

would otherwise bring down the entire system. When used in conjunction with other Dell

PowerEdge reliability and redundancy features for virtualization — such as the internal dual

SD modules — it creates a highly reliable VMware virtualization server environment with high

availability and uptime.

Dell Fault Resilient Memory Figure 5.

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