Unsolved
1 Rookie
•
2 Posts
0
68
December 5th, 2025 07:54
Dell PowerEdge R740xd Cannot Boot Proxmox from NVMe on ASUS Hyper M.2 PCIe Adapter
Hi Community,
I am trying to boot a Dell PowerEdge R740xd from NVMe SSDs installed via an ASUS Hyper M.2 PCIe adapter, and I am running into a persistent boot issue.
Server Details
Model: Dell PowerEdge R740xd
CPUs: Dual CPUs installed
BIOS Mode: UEFI
- BIOS updated to latest version
Storage Setup
Two Samsung NVMe SSDs installed on separate PCIe → M.2 adapters
(ASUS Hyper M.2 card previously used, now individual cards for OS mirror)Each NVMe is detected correctly by the Proxmox installer
Proxmox installs successfully on a ZFS RAID1 mirror
Problem
After installation, the server fails to boot and loops through:
Booting from Linux Boot Manager
Boot Failed: Linux Boot Manager
Thank you!
No Events found!
DELL-Erman O
Moderator
•
2.9K Posts
1
December 5th, 2025 13:30
Hi,
The root cause is that the Dell PowerEdge R740xd BIOS does not include native NVMe boot support for third-party PCIe adapters. While the NVMe drives are detected by the Proxmox installer (thanks to Linux NVMe drivers), the system firmware cannot recognize these devices as bootable. As a result, although the installation creates a “Linux Boot Manager” entry, the BIOS is unable to correctly map this entry to the NVMe device.
Hope that helps!
Lhenex
1 Rookie
•
2 Posts
0
December 9th, 2025 05:06
Hi Dell-Erman O,
Thanks for the explanation.
Can you please confirm whether the Dell DPWC300 NVMe M.2 PCIe Storage Adapter (Part numbers: 23PX6 / NTRCY / 9C5W2) supports booting an operating system on a PowerEdge R740xd?
Or is it only a data-only NVMe carrier requiring a Dell BOSS or supported NVMe backplane for boot functionality?
Dell DPWC300 NVMe M.2 PCIe Solid State Storage Adapter Card 23PX6 NTRCY 9C5W2 | eBay Australia
Thanks again.
DELL-Young E
Moderator
•
5.3K Posts
1
December 9th, 2025 05:48
Hello the card you found doesn't work on your server model. It is for one of our Precision models. R740xd will support BOSS for boot.