[nvdimm.nvmem.initfail:FAULT]:NVMEM subsystem initialization failed because NVDIMM device in slot-23 lost persistence due to SDRAM not in self-refresh mode , andNVDIMM HARDWARE error.. To prevent NVME...[nvdimm.nvmem.initfail:FAULT]:NVMEM subsystem initialization failed because NVDIMM device in slot-23 lost persistence due to SDRAM not in self-refresh mode , andNVDIMM HARDWARE error.. To prevent NVMEM data loss, halt the system. [nvdimm.nvmem.destage.failure:ALERT]:NVMEM subsystem failed to copy nonvolatile data to flash memory on NVDIMM device because SDRAM is not in self-refresh mode, and because of a hardware error..