I am not sure which it needs. If it did not stop windows from booting then it may have updated the wrong thing.
Try /dev/sda3 it will either work or give you an error in my experience.
What OS does the main boot loader come from and/or is the machine EFI? Something in the main boot loader will be pointing to sda5 still I would guess. I have not had any dual boot machines so I don't know much about how that works.
If it is dropping to the grub shell that is a sign that it did not find the /boot partition or nothing is on the /boot partition and/or the config files and such. So it is finding grub but not /boot, but it is not clear if this is the sda3 grub or the sda5 grub.
if you are using EFI (and not legacy-legacy would have required a bios setting change on any hw build in the last 7+ years) then you probably need to get into the EFI menu and use it to fixit.
Though if you have EFI, livecd boot (and possibly chroot type rescue ) and type efibootmgr if that returns boot info that is where the boot magic is, and you will either need to switch to sda3 there or in the bios/efi cli menu.
man efibootmgr and/or google efibootmgr. And if it is in you should grub-install on sda3.
On Thu, Apr 22, 2021 at 10:41 PM Michael Hennebry hennebry@web.cs.ndsu.nodak.edu wrote:
When I ran grub2-install, I used /dev/sda . Should I have used /dev/sda3 ?
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