boot PVE from MBR/GRUB usb stick?

p3ter_b

New Member
Mar 20, 2024
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Hi everyone!

I have Proxmox v9 running on my "good old" HP Proliant Gen8 Microserver (4 HDD bays):

The system boots fine, **IF** I put the OS-disk in the 1st bay slot, so I know the PVE setup is fine.
But I get a "BIOS cannot find system disk to boot" issue whenever I have the OS disk on USB3 or ODD-SATA.

These servers are known for their issues to boot if the OS disk(s) are NOT in the 1st slot of a disk-bays, but the 5th SATA ("ODD") or USB:

These servers also don't do EFI, just BIOS to boot.

I've created a properly GPT-partitioned USB stick (according to the Host Bootloader Wiki article) - and initialized it using `proxmox-boot-tool format/init` - but this stick won't boot at all.

Does anyone have a BIOS/MBR grub setup/config which can be used to chainload boot a Proxmox 8/9?

When I try Ventoy to boot local disks, I get "invalid signature: must load kernel first".

I know it seems like a weird setup to waste time on, but these servers run super-reliably /once they boot/ - so I'd like to keep them.
Also to show that hardware can be used longer than advertized ;)
(And there seem to be more users running PVE on Gen8 Microservers, too)


Any hints or setup suggestions greatly welcome!
:)
 
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