Trying to reinstall GRUB 2, cannot find a device for /boot (is /dev mounted?)












2















I was trying to install a new Ubuntu 12.04 installation next to my old 10.10 installation, and I've run into a problem. My computer seems to have a finicky BIOS, and wants a boot partition less than 40 GB in size. So, when I installed 10.10, I split the system into /boot on /dev/sda1 and / on /dev/sda6.



When I installed 12.04 LTS, I totally forgot about it, and now I need to reinstall GRUB. But, I seem to be getting an error.



mint@mint ~ $ sudo grub-install --root-directory=/mnt /dev/sda
grub-probe: error: cannot find a device for /boot (is /dev mounted?).
Installation finished. No error reported.


I'm running this from a Linux Mint live USB device that I had lying around, the GRUB version is the same as the one Ubuntu 12.04 uses, I think.



So, is there something I'm missing, or would it be a better idea to just restart the Ubuntu installation?










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    2















    I was trying to install a new Ubuntu 12.04 installation next to my old 10.10 installation, and I've run into a problem. My computer seems to have a finicky BIOS, and wants a boot partition less than 40 GB in size. So, when I installed 10.10, I split the system into /boot on /dev/sda1 and / on /dev/sda6.



    When I installed 12.04 LTS, I totally forgot about it, and now I need to reinstall GRUB. But, I seem to be getting an error.



    mint@mint ~ $ sudo grub-install --root-directory=/mnt /dev/sda
    grub-probe: error: cannot find a device for /boot (is /dev mounted?).
    Installation finished. No error reported.


    I'm running this from a Linux Mint live USB device that I had lying around, the GRUB version is the same as the one Ubuntu 12.04 uses, I think.



    So, is there something I'm missing, or would it be a better idea to just restart the Ubuntu installation?










    share|improve this question

























      2












      2








      2








      I was trying to install a new Ubuntu 12.04 installation next to my old 10.10 installation, and I've run into a problem. My computer seems to have a finicky BIOS, and wants a boot partition less than 40 GB in size. So, when I installed 10.10, I split the system into /boot on /dev/sda1 and / on /dev/sda6.



      When I installed 12.04 LTS, I totally forgot about it, and now I need to reinstall GRUB. But, I seem to be getting an error.



      mint@mint ~ $ sudo grub-install --root-directory=/mnt /dev/sda
      grub-probe: error: cannot find a device for /boot (is /dev mounted?).
      Installation finished. No error reported.


      I'm running this from a Linux Mint live USB device that I had lying around, the GRUB version is the same as the one Ubuntu 12.04 uses, I think.



      So, is there something I'm missing, or would it be a better idea to just restart the Ubuntu installation?










      share|improve this question














      I was trying to install a new Ubuntu 12.04 installation next to my old 10.10 installation, and I've run into a problem. My computer seems to have a finicky BIOS, and wants a boot partition less than 40 GB in size. So, when I installed 10.10, I split the system into /boot on /dev/sda1 and / on /dev/sda6.



      When I installed 12.04 LTS, I totally forgot about it, and now I need to reinstall GRUB. But, I seem to be getting an error.



      mint@mint ~ $ sudo grub-install --root-directory=/mnt /dev/sda
      grub-probe: error: cannot find a device for /boot (is /dev mounted?).
      Installation finished. No error reported.


      I'm running this from a Linux Mint live USB device that I had lying around, the GRUB version is the same as the one Ubuntu 12.04 uses, I think.



      So, is there something I'm missing, or would it be a better idea to just restart the Ubuntu installation?







      grub2






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      asked Jan 2 '13 at 20:51









      Ryan J HootsRyan J Hoots

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          I encountered the cannot find a device for /boot (is /dev mounted?) error message in a VM I was working on. I have no idea if my solution will apply to you, or to anyone else.



          I surmised that grub-install expects to be run inside the host OS filesystem, and it expects to be able to see the mount of the root filesystem for that host.



          I did the following (which I am typing from memory, so it is possible there are errors).



          # mount /dev/sdaN /mnt
          # mount --rbind /dev /mnt/dev
          # mount --rbind /proc /mnt/proc
          # mount --rbind /sys /mnt/sys
          # chroot /mnt bash
          # mount /dev/sdaN /
          # grub-install /dev/sdaN


          I was then able to reboot the VM successfully. My host OS was Ubuntu 18.04, and the rescue environment was a version of Debian with a 4.x kernel.






          share|improve this answer























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            1 Answer
            1






            active

            oldest

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            active

            oldest

            votes






            active

            oldest

            votes









            0














            I encountered the cannot find a device for /boot (is /dev mounted?) error message in a VM I was working on. I have no idea if my solution will apply to you, or to anyone else.



            I surmised that grub-install expects to be run inside the host OS filesystem, and it expects to be able to see the mount of the root filesystem for that host.



            I did the following (which I am typing from memory, so it is possible there are errors).



            # mount /dev/sdaN /mnt
            # mount --rbind /dev /mnt/dev
            # mount --rbind /proc /mnt/proc
            # mount --rbind /sys /mnt/sys
            # chroot /mnt bash
            # mount /dev/sdaN /
            # grub-install /dev/sdaN


            I was then able to reboot the VM successfully. My host OS was Ubuntu 18.04, and the rescue environment was a version of Debian with a 4.x kernel.






            share|improve this answer




























              0














              I encountered the cannot find a device for /boot (is /dev mounted?) error message in a VM I was working on. I have no idea if my solution will apply to you, or to anyone else.



              I surmised that grub-install expects to be run inside the host OS filesystem, and it expects to be able to see the mount of the root filesystem for that host.



              I did the following (which I am typing from memory, so it is possible there are errors).



              # mount /dev/sdaN /mnt
              # mount --rbind /dev /mnt/dev
              # mount --rbind /proc /mnt/proc
              # mount --rbind /sys /mnt/sys
              # chroot /mnt bash
              # mount /dev/sdaN /
              # grub-install /dev/sdaN


              I was then able to reboot the VM successfully. My host OS was Ubuntu 18.04, and the rescue environment was a version of Debian with a 4.x kernel.






              share|improve this answer


























                0












                0








                0







                I encountered the cannot find a device for /boot (is /dev mounted?) error message in a VM I was working on. I have no idea if my solution will apply to you, or to anyone else.



                I surmised that grub-install expects to be run inside the host OS filesystem, and it expects to be able to see the mount of the root filesystem for that host.



                I did the following (which I am typing from memory, so it is possible there are errors).



                # mount /dev/sdaN /mnt
                # mount --rbind /dev /mnt/dev
                # mount --rbind /proc /mnt/proc
                # mount --rbind /sys /mnt/sys
                # chroot /mnt bash
                # mount /dev/sdaN /
                # grub-install /dev/sdaN


                I was then able to reboot the VM successfully. My host OS was Ubuntu 18.04, and the rescue environment was a version of Debian with a 4.x kernel.






                share|improve this answer













                I encountered the cannot find a device for /boot (is /dev mounted?) error message in a VM I was working on. I have no idea if my solution will apply to you, or to anyone else.



                I surmised that grub-install expects to be run inside the host OS filesystem, and it expects to be able to see the mount of the root filesystem for that host.



                I did the following (which I am typing from memory, so it is possible there are errors).



                # mount /dev/sdaN /mnt
                # mount --rbind /dev /mnt/dev
                # mount --rbind /proc /mnt/proc
                # mount --rbind /sys /mnt/sys
                # chroot /mnt bash
                # mount /dev/sdaN /
                # grub-install /dev/sdaN


                I was then able to reboot the VM successfully. My host OS was Ubuntu 18.04, and the rescue environment was a version of Debian with a 4.x kernel.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Dec 7 '18 at 22:42









                mpbmpb

                37318




                37318






























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