Operation stages for NVDIMM-Ns

• While the server is powered on:
  • Each NVDIMM-N operates at the speed of a regular DDR4 DIMM and data is stored in the DRAM.
  • Each NVDIMM-N accesses data in the DRAM based on the processor load/store instructions and PCIe memory read and write transactions.
  • Each NVDIMM-N is accessed using special device drivers.
  • Each NVDIMM-N is not presented as regular system memory.
• When power to the server is lost:
  • Each NVDIMM-N copies or backs up data from its DRAM to its NAND flash memory.
  • Each NVDIMM-N draws power from the HPE Smart Storage Battery on the server.
• While the server is powered off, data is saved in the NAND flash memory of each NVDIMM-N.
• When the server is powered on, each NVDIMM-N restores data from its NAND flash memory to its DRAM during the server POST process.

For more information on persistent memory, see the Hewlett Packard Enterprise website (http://www.hpe.com/info/persistentmemory). For more information about HPE NVDIMMs, see the product QuickSpecs on the Hewlett Packard Enterprise website (http://www.hpe.com/info/qs).