H370M-ITX/ac and NVME m.2 boot problems

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   Hello Everyone! I hope I can find the answer to my problem here. 

This is my config:
H370M-ITX/ac
intel g5400
6 x 4tb 3.5 WD drives
1 hp ex900 m.2 250gb
BIOS: 3.10/3.00
OS: Debian, Ubuntu, Proxmox. Problem is replicable across multiple OSes. 

I'm experiencing a problem with NVME drive at boot. It appears that BIOS can't see NVME drive after every power cycle (not reboot, but shutdown only). This problem goes away  if I hit F11 or enter the BIOS without doing anything else. I don't have to select or change anything, the only thing I have to do is to activate/enter BIOS. The problem will appear again after next power cycle.

Problem: Shutdown > boot > no nvme drive present
Workaround: Shutdown > boot > enter bios or press f11 or select drive > nvme is present 

Any ideas?

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eugene29 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 26 Dec 2018 Status: Offline Points: 4	Post Options Post Reply Quote eugene29 Report Post Thanks(0) Quote Reply Topic: H370M-ITX/ac and NVME m.2 boot problems Posted: 26 Dec 2018 at 10:33am
	Hello Everyone! I hope I can find the answer to my problem here. This is my config: H370M-ITX/ac intel g5400 6 x 4tb 3.5 WD drives 1 hp ex900 m.2 250gb BIOS: 3.10/3.00 OS: Debian, Ubuntu, Proxmox. Problem is replicable across multiple OSes. I'm experiencing a problem with NVME drive at boot. It appears that BIOS can't see NVME drive after every power cycle (not reboot, but shutdown only). This problem goes away if I hit F11 or enter the BIOS without doing anything else. I don't have to select or change anything, the only thing I have to do is to activate/enter BIOS. The problem will appear again after next power cycle. Problem: Shutdown > boot > no nvme drive present Workaround: Shutdown > boot > enter bios or press f11 or select drive > nvme is present Any ideas?

RLGL Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 29 Jul 2018 Location: MN Status: Offline Points: 2025	Post Options Post Reply Quote RLGL Report Post Thanks(0) Quote Reply Posted: 26 Dec 2018 at 10:17pm
	Is the nvme formatted as GPT or MBR? Needs to be GPT.
	Asrock Z370 Gaming K6,Intel i7 8700K, Asrock x570 Taichi

eugene29 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 26 Dec 2018 Status: Offline Points: 4	Post Options Post Reply Quote eugene29 Report Post Thanks(0) Quote Reply Posted: 27 Dec 2018 at 3:58am
	It is GPT.