dconklin

[Bug Report] 7.3.0-beta.1 Internal Boot Setup Fails on Ugreen DXP4800 Plus - Missing GRUB Modules on EFI Partition Hardware: Ugreen NASync DXP4800 Plus (Intel Pentium Gold 8505, 64GB DDR5, 2x Samsung 990 Pro 2TB NVMe in cache pool) Unraid Version: 7.3.0-beta.1 Issue: Internal boot setup via the Onboarding Wizard completes without errors but system fails to boot from NVMe. BIOS either falls back to USB or drops to a GRUB rescue prompt. What the wizard does correctly: Correctly partitions both NVMe drives (p1=1MB BIOS, p2=510MB EFI, p3=15.5GB Unraid OS/ZFS, p4=1.8TB data/cache) Correctly installs BOOTX64.EFI (GRUB) to /EFI/BOOT/ on the EFI partition Correctly creates and populates the ZFS boot partition (p3, labeled "flash") with all required files: bzimage, bzroot, bzfirmware, bzmodules, and a fully configured /boot@/grub/grub.cfg Correctly registers a UEFI boot entry via efibootmgr What the wizard does NOT do: It does NOT copy the GRUB modules (linux.mod, all_video.mod, zfs.mod, etc.) to the EFI partition It does NOT create a /grub/grub.cfg on the EFI partition telling GRUB where to find its config Root cause: GRUB's BOOTX64.EFI sets prefix=(hd1,gpt2)/grub and looks for its config at /grub/grub.cfg on the EFI partition. This file doesn't exist after the wizard runs. Additionally, even when a grub.cfg is manually created, the required GRUB modules (particularly linux.mod) are not present on the EFI partition, so GRUB cannot execute linux or initrd commands. The ZFS boot partition contains a complete and correct /boot@/grub/ directory with all modules and a proper grub.cfg, but GRUB on the EFI partition has no way to reach it without first loading zfs.mod and linux.mod — which aren't there. Expected fix: The wizard should copy the required GRUB modules to /grub/x86_64-efi/ on the EFI partition AND create a /grub/grub.cfg that loads those modules and chains to the ZFS boot partition's grub.cfg. Workaround: None that survives updates. Manual copying of modules and grub.cfg works temporarily but will likely be overwritten by future updates. Additional notes: Ran the wizard multiple times, same result each time efibootmgr correctly registers the Unraid boot entry USB flash boot continues to work perfectly as fallback Both NVMe drives show correctly in BIOS (KEYM2 enabled) Watchdog disabled in BIOS as required for Unraid on this hardware