Author: parsec
Subject: X99-WS, SM951 NVMe, Windows 10 Oddities
Posted: 24 Feb 2016 at 3:23pm
An SM951, or any NVMe PCIe SSD runs with a UEFI rather than a Legacy boot loader. You have either Launch Storage OpROM Policy set to UEFI Only, or CSM set to Disabled, in order to be able to install Windows and boot from an NVMe SSD.
Among the four partitions on your SM951 is a semi-hidden Legacy MBR partition that Windows includes along with the UEFI GPT partition. That is included so legacy Windows utilities like the Windows memory test will still run.
This configuration works with SATA drives, since a SATA drive can boot in both a Legacy and UEFI environment. An NVMe SSD cannot boot in a Legacy environment, only in a UEFI environment.
My question is, does the Windows RE software need to run in the legacy environment? Or put another way, can it run in the UEFI environment? I don't know if it can or not. This is the question that needs an answer from MS, to either stop you from wasting your time (if it cannot) or to find another answer (if it can.)
Subject: X99-WS, SM951 NVMe, Windows 10 Oddities
Posted: 24 Feb 2016 at 3:23pm
An SM951, or any NVMe PCIe SSD runs with a UEFI rather than a Legacy boot loader. You have either Launch Storage OpROM Policy set to UEFI Only, or CSM set to Disabled, in order to be able to install Windows and boot from an NVMe SSD.
Among the four partitions on your SM951 is a semi-hidden Legacy MBR partition that Windows includes along with the UEFI GPT partition. That is included so legacy Windows utilities like the Windows memory test will still run.
This configuration works with SATA drives, since a SATA drive can boot in both a Legacy and UEFI environment. An NVMe SSD cannot boot in a Legacy environment, only in a UEFI environment.
My question is, does the Windows RE software need to run in the legacy environment? Or put another way, can it run in the UEFI environment? I don't know if it can or not. This is the question that needs an answer from MS, to either stop you from wasting your time (if it cannot) or to find another answer (if it can.)