PROBLEM - Dell recovery media does NOT recognize NVME SSD
Solution - Found at Dell support page in
https://www.dell.com/support/article/ko-kr/sln310971/
Precision 5820/7820/7920: NVME 드라이브에서 Windows 10 설치가 실패 함
1. Download RSTe 5.3.1 at
https://www.dell.com/support/home/drivers/driversdetails?driverId=TV5DJ
2. Extract the file to "/Drivers/BootCritical" directory of USB boot media
3. Do 3rd party driver install at Recovery screen, by selection Windows8.1 directory
NOW the Windows recovery recognize NVME SSD at MiniSAS-0 slot.