Re: Converted MBR to GPT and menu is gone, can't use grub-reboot either

[Pascal Hambourg]

Le 20/02/2023 à 02:17, Chandler a écrit :
> Shouldn't there be a way to just reinstall grub again?

You can do it with grub-install. Since you have a RAID setup, make sure 
you reinstall GRUB on all drives.

> I thought I did that when converted to GPT

Yes, the GPT partition table overwrites the existing GRUB core image 
(which cannot read GPT anyway) so GRUB would not be able to boot the 
system if you had not reinstalled it.