Re: How to install grub onto an added drive?

[Pascal Hambourg]

Le 18/11/2019 à 20:44, sashab a écrit :
> fist of all: A fresh install will be much less pain ;)

But so much less fun.

> Moving '/' to new device:
> You'll have to boot a "live system" from a CD,
> to copy your rootfs.

No, you don't. You can do it from the installed system.

> It would be better to create a new fs on /dev/nvme0p?
> and rsync all files.

Better than what ? Cloning the raw partition then extending the 
filesystem ? Why ?

> If you have no separate boot partition

Actually I am failing to understand whether the small boot drive will be 
the current SSD or a new empty drive.

> However, you'll need to
>      dpkg-reconfigure grub-pc
> (or however the package's name is on xubuntu)
> so that future updates of grub get installed on the right drive.

Good catch. Actually if you are familiar with using chroot you could 
even do this after chrooting to the new root filesystem instead of 
running grub-install and grub-mkconfig (or update-grub) as it will also 
perform both operations.