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Dell EMC NVDIMM-N Persistent Memory User Guide

Restore from Flash

On server power-up, BIOS re-initializes the DRAM on the NVDIMM-N. BIOS commands the NVDIMM-N Controller using the SMBus Management Interface to restore its DRAM contents from Flash. The restore process takes approximately one minute to complete. This duration is independent of the number of NVDIMM-Ns installed in the server because Restores occur in parallel across all NVDIMM-Ns. BIOS then exposes the NVDIMM-N to the Server OS as Persistent Memory. Note that Persistent Memory is distinct from System Memory which is required for normal OS operation. Please refer to the respective OS Sections for more details on OS support of Persistent Memory.

Figure 1. Restore Operation
This image shows restore operation.

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