So, I made my bootable EndevourOS image. I installed it on my secondary SSD, while I have Win11 on my primary SSD (need it for my job).

When I installed it I booted it up and everything was ok. A bit confusing, but ok.

Wanted to get into Windows again because I needed to work on something for a design (Adobe programs), next thing I know: my computer isn’t recognizing my Windows drive…

It’s there. I can see it on the “disks” app on EndevourOS, I can mount the disk and even see my files in there. But it just won’t boot.

Read the documentation and it mentions an “os-prober”, that I needed to change GRUB_DISABLE_OS_PROBER=false in the etc/default/drub file… I don’t have that file anywhere in my system…

I installed os-prober, nothing. I searched any other folder with a similar name and checked files… The only file with a mention of os-prober is grub.d that says “if GRUB_DISABLE_OS_PROBER=xtrue then random warning”, but that is a set of instructions (i think), not the actual file.

I don’t think I should have tried EOS/Arch when I’ve been learning Linux for only 2 days, can anybody help me with this? Thank you for any answers in advance.

  • @[email protected]
    17•1 year ago

    The issue is that grub, the bootloader, doesn’t know about windows and can’t boot it. You can go into BIOS and change the boot order to boot windows without figuring this out as a stopgap.

    I had to create /etc/default/grub as well on arch, so do that and rerun grub-mkconfig.

    As usual, the arch wiki has a great but short guide on that: https://wiki.archlinux.org/title/GRUB#Detecting_other_operating_systems Read the entire article to get an idea of how to work with grub, then follow the windows section exactly.

    • redimkOP
      4•1 year ago

      That’s the problem not even the bios is reading windows after the EOS installation. I keep changing the order of things but when I boot from the other SSD it just says “checking media” and then “failed” and it gets looped over and over again.

      But I can still see the windows drives and partitions from EOS… It’s the weirdest ting that I’ve seen… Would you recommend just doing a clean install of everything in that case?

      • @[email protected]
        6•1 year ago

        Sounds like there’s something wrong with your windows EFI partition in that case.

        I don’t know how to fix that short of a reinstall. If you do reinstall, make sure to unplug (yes, that’s actually neccessary) all drives except the one you want to install windows on, otherwise the installer is almost guaranteed to fiddle around with them despite you not selecting them.

        • @PainInTheAES
          2•1 year ago

          Lmao the windows installer won’t mess around with your other drives. Not even other partitions. I’ve reinstalled Windows 11 alongside Linux without issue. Other than having to reset the default efi image in the BIOS.

          • @[email protected]
            4•1 year ago

            There are people who make backups and people who will.

            It’s the same thing with this: Even if it goes nicely most of the time, it’ll eventually screw up everything and you’ll be spending at least an hour figuring out what went wrong.

      • @[email protected]
        4•1 year ago

        It sounds like your EFI partition got fucked somehow. You could boot a live usb with windows tool like Hirens or Sergei and fix it in there. There are tools in Sergei to fix these issues, I sometimes do this at my job.

        • redimkOP
          1•1 year ago

          This is what I’m thinking happened. I already said this in another comment but will expand here because this comments refers specifically to the EFI partition. Here’s the weird thing, 3 days ago, I had 2 SSDs:

          • 1 with 3 partitions of Windows, one EFI part., one recovery part, and the regular C: local where my files were.
          • On my secondary SSD, I had Fedora installed. If I’m correct, I had a /boot, and /home(?) don’t remember if anything else.

          I decided to do a clean install of Win11. When I did, I had both SSDs connected to my laptop, and when I finished the installation, this was how it was divided:

          • 1st SSD: one, full 2TB C: Local disk, with no partitions.
          • 2nd SSD: One EFI partition, one recovery partition, and one “empty” partition.

          It was highly confusing, because I thought I had Fedora there, my immediate thought was that Win11 just straight up ravaged both my SSDs and decided “fuck it, let’s install wherever the fuck I want” and it did. HOWEVER I could still get into Fedora and use it normally. Still had all the apps and programs I installed, everything was correct. So I assumed the drive still belonged to Fedora.

          When I installed EOS, I chose “Erase Disk” on the secondary SSD (the one with Fedora, the one that had this “EFI partition” that didn’t have before. I think when I erased that SSD, I erased the Windows EFI partition and couldn’t boot as a result. And that’s why the BIOS was not recognizing the OS, but at the same time I could just mount the SSD in EOS and just look t my files normally. So I think that’s what happened, but honestly I’m not even sure of how it happened.

          • @dis_honestfamiliar
            3•1 year ago

            Yeah it sounds like you messed up your boot partition. I’m not sure with EFI partitions, but when I used to mess up my legacy boots, I would recover using the windows recovery tools. Some command that would recover them. Again, I’m not sure abilout EFI partition, but maybe this is all you needed.

            Anyway, good luck on your next try. I for one go with the safe route of removing drive(s) until I have the drives I need the install process to know about, you know when first installing an OS. I just don’t have the time for reinstalling things if something does go wrong.

      • Gunpachi
        2•1 year ago

        I have a similar issue on my PC. My windows ssd doesnt even appear in the BIOS unless I keep my computer on for over 30 minutes.

        I know it’s not a fix but you could try booting to endavourOS for sometime and then reboot the system into bios and maybe the windows boot entry will show up. (This works in my case, although when I shutdown the system and boot it the next day, I have to repeat all this)

        Whenever I install a minimal linux distro like void, arch or gentoo all my boot entries disappear somehow (even though I have configured grub correctly). But for some reason when I install a distro with the calmares installer this doesn’t happen.

        I even tried reinstalling windows multiple times on different ssd’s still no luck. My hunch is that the NVRAM in my MSI motherboard is causing the problem.

        I would appreciate it, if anyone more knowledgeable on this topic can shed some light on this.

      • @[email protected]
        1•1 year ago

        1. To boot endeavour, did you have to change any BIOS settings? If so, change those back and ignore the reat of this.

        2. Backup your windows user folder if you haven’t already, put it somewhere safely away from your PC

        3. No seriously, back up your files to another drive asap

        4. You will deeply regret it if you do not back up

        5. Do you know what the word hubris means? Back those files up, champ

        6. I mean, it’s your computer, so you can make whatever terrible decisions you want. You should still back it up tho

        7. Make a windows installation USB or, better yet, a winpe usb if you have access to another windows computer. Boot into it, but DO NOT continue with the installation. Instead, select the option that lets you run Startup Repair.

        8. Run startup repair

        9. When that fails, because it’s apparently a script that just freezes the PC for a minute before telling you it failed, follow this guide

        10. If all that fails: unless you really wanna RTFM on the windows bootloader and EFI partition, or piece together the equivalent knowledge from 83 different forums and blog posts after you separate out the mountains ofmisinformation, you can always just reinstall windows and restore from the backups… you did back up, right?

      • @[email protected]
        1•1 year ago

        The checking media message is your bios trying to boot from some external network drive. I had that issue for the longest, and I realized that I misunderstood how the boot order actually worked.

        Try swapping your boot order around to opposite how it is currently? That’s what I did and it solved my problem

        • redimkOP
          1•1 year ago

          I tried all orders, there were 2 Samsung SSDs (primary and secondary), and another one called “EFI” something… When I changed the order to SSD #1 it opened EndevourOS, when I changed to SSD #2 it said “checking media… failed”, and when I put the “EFI” as the first in the order, it just restarted and went again to EndevourOS. At the end, I had to do the easiest and fastest thing: start over.

          I think that when I installed Win11, it took part of my Fedora partition somehow, I’m not even sure if that’s what happened and if that is what actually happened I have no clue how it happened, but right before erasing my secondary SSD to install EOS, there was a mention of a Windows “EFI” partition there, even though I could still get into Fedora. So when I erased that, I think I erased something related to Windows that I shouldn’t have erased