[SOLVED] Grub Rescue screen after reboot

used1d

Member
Jun 16, 2025
50
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Hello, I am new to PBS and have installed PBS v4.0-1 onto an old Optiplex 3020. I was over zealous and first installed it on an 8TB HDD...but I wanted to actually install the OS on an NVMe drive and have the data on the 8TB drive. (I have a 128GB 2230 NVMe drive in a PCIE x1 adapter, and the 8TB HDD via SATA). I reinstalled it and it was working, except I was still seeing the boot partitions on the 8TB drive and I wanted to clear out all that data. So, in the PBS web UI I removed the partitions of the HDD drive (sda1, sda2, and sda3 would not remove because it said it was still in use). This had me confused because I'm a noob. So I rebooted and it wouldn't boot; it just showed the Grub Rescue screen. I thought it was because of a partitioning issue, so I installed Ubuntu and manually partitioned all drives, rebooted, but again it was stuck on the Grub Rescue screen. I've already tried SuperGrub2, but when manually booting in SuperGrub2 it gave errors for ALL of the OS's: "error: cannot unload referenced module," and "error: unknown filesystem." I'm hoping anyone can assist with getting PBS installed correctly on this machine. Thank you.

**SOLVED** after 10 days with nobody's help except Reddit's. Not even 1 reply..jeez laweez. Downloaded the gparted iso to my USB thumbdrive, booted the iso via Ventoy, deleted all partitions (not the thumbdrive), reinstalled PBS...working like a charm now!
 
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