I don’t know where to begin, I have a desktop computer with 3 SSDs, one for Win 11 (work stuff) and one for different Linux distors. The third is a common storage disk for both systems.
I am very accustomed to computers and different OS. I have used different Linux distros for the last 10-15 years.
Today after work I thought I would check out endeavourOS, so I installed it on a free USB stick, restarted and started from it. EndeavourOS showed up I started GParted to check what disk to use, /dev/sdb, formatted using trusted gparted.
Checked no mistakes made, still a Win-disk and a newly formatted disk to use.
Started the installer, did not finalize that, came to the step where one chooses what disk to install to. Then one of my kids got home and wanted to play a game, sure I said and quit the installer and restarted the computer.
Now I end up in UEFI/BIOS, system says there is no boot disk, I see that the three disks are connected. But none of them have a bootalble system.
What did just happen? On the sdb disk I had PopOS with a failed Grub install, the system were set to start from the Win11 disk.
I have no idea what just happened, anyone that ha any clue and can give me a hint?
It looks like you actually started EndeavourOS installation and proceeded far enough to install a bootloader but bootloader installation failed.
Also, for some reason, Windows bootloader was residing on the disk you just formatted so you wiped Windows boot files too. Your boot files don’t reside on Windows partition because there is no EFI system partition.
Install EndeavourOS as normal (to /dev/sdb) if you wish to use EndeavourOS. If you want to repair Windows, you need a Windows boot disk.
If you are going to reinstall the whole shebang then make sure secure boot and CSM are disabled and it is set to UEFI only. Install Windows back on the disc you want it installed and then install EndeavourOS on the other disc. Should not be any problem to dual boot Windows with EndeavourOS.