PVE 8.4.1: installer crashes, partition unbootable

xeijin

New Member
Jun 7, 2025
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Hi,

I'm trying to install Proxmox VE 8.4.1 on a Firebat T8 Pro (16GB RAM, Intel N100, 512GB SSD).

At some point during the install, usually towards the end ('making device bootable' - though occasionally happens mid-install during dpkg commands) the installer suddenly crashes - no warning, the box just suddenly reboots. Confirming this is not the usual end of install reboot, as I always uncheck 'Automatically reboot' in the installer.

The disk then becomes invisible to the BIOS as a boot option (though *nix operating systems see it with a corrupted boot partition).

Other details:

- I have previously installed older versions (7.x) without issue on the same box
- SecureBoot is off
- The BIOS is UEFI - there is no disable CSM or legacy boot option unfortunately
- Other linux OS' I've tried install without issue (NixOS, Fedora)
- I am formatting the single drive as ZFS (Raid 0) in the installer, though the same issue is present with ext4 (not tested extensively)
- I am booting via Ventoy, but have also tried writing the raw ISO to a USB, and even booting over iPXE using netboot.xyz ... same results
- I am running `wipefs -a /sdx` & `sgdisk --zap-all /sdx` to clear away any old partitions before running the installer each time
- I can mount the ZFS partition and can see the installed files on there, so this does seem to be bootloader corruption
- I've tried booting in both Terminal and Graphical Modes, and Graphical debug - same issue with each, unfortunately Graphical debug is not much help as the issue happens during the actual install
- The install seems to go fine when I spin it up in an OVMF VM on my other Proxmox host
- Using the installer's Rescue Mode does not work - it can't 'find' a bootable proxmox install


I wrote a script to try and stream the outputs of dmesg & the install logs to my USB drive, but nothing too interesting looking (to my untrained eye). See attached.

Any ideas? I am thinking maybe buggy UEFI BIOS, but then older versions did install without issue ‍♂️
 

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Last edited:
I have the same issue with some hardware I am trying to test.
I am trying to install 8.4.1 on a Supermicro Microcloud system with a Xeon E3-1240v6, 32GB DDR4 (2x16 2666), onto two Samsung 860 2.5" SATA SSD in a ZFS RAID 1.
The install gets to near the end and then the system reboots, even when 'reboot after install complete' is unticked. The partition is not bootable.

The same system also cannot boot the Proxmox VE 9.0 beta ISO, it gets stuck at the creating ramdisk step.