I have a computer with two SSDs, one with Windows 10 and another with Arch, freshly installed.

When I boot up and get to the Grub menu, the only options available are for Arch and Advanced Setup for Arch. No Windows 10.

When I select Arch, log in as root, and run fdisk -l, here's the output.

enter image description here

  • 1
    run update-grub
    – jsotola
    May 26 '19 at 20:17
  • Also with mounting the EFI and Windows system partition and running os-prober. More here wiki.archlinux.org/index.php/…
    – Biswapriyo
    May 26 '19 at 20:28
  • @jsotola I ran ‘sudo update-grub’ but got “command not found” as output.
    – Username
    May 26 '19 at 23:10
  • @Biswapriyo I installed ‘os-prober’ and ran ‘os-prober’ but got no output
    – Username
    May 26 '19 at 23:13

Try mounting the Windows partition and running sudo grub-mkconfig -o <path-to-grub.cfg> now that you have os-prober installed. On my system the path is /boot/grub/grub.cfg.

  • What code should I run to mount the Windows partition?
    – Username
    May 27 '19 at 19:13
  • 1
    @Username I would try sudo mount <device> /mnt, where <device> is the partition. If the Samsung 860 in the screenshot is the SSD with Windows, for example, the device would be /dev/sdd1.
    – antone
    May 27 '19 at 20:10

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