Re: How to install grub onto an added drive?

[Chris Green]

On Mon, Nov 18, 2019 at 08:44:25PM +0100, sashab wrote:
> Hi Chris,
> 
> fist of all: A fresh install will be much less pain ;)
> 
Well, yes, except that I'd have to re-install all the things I've
added to the basic/standard setup.


> If you'd like to do it all manually,
> let's assume you have
>     /dev/sda - "old" SSD
>     /dev/sda1 - /boot
>     /dev/sda2 - /
>     /dev/nvme0 - "new" SSD
> 
> Moving '/' to new device:
> You'll have to boot a "live system" from a CD,
> to copy your rootfs.
> It would be better to create a new fs on /dev/nvme0p?
> and rsync all files.
> After this you look the UUID of your "new" rootfs up
> (e.g. with blkid) and change the /-mount in /etc/fstab accordingly.
> sync, reboot and if it comes up and you see "/dev/nvme0p? ... on /" in
> `mount`, your're gold.
> 
> 
> If you have no separate boot partition, you'll have to create one and
> mark it bootable and create a fs on it (ext2 is sufficient).
> Then, rsync the contents of /boot to the new fs (especially kernel and
> initramfs).
> After doing so, create an appropriate entry in /etc/fstab and mount the
> partition.
> If we assume it's /dev/sda1, then you have to
>     grub-install --target i386-pc /dev/sda
>     grub-mkconfig
> If both commands give you no warnings/errors,
> the system should be able to boot from your newly created partition.
> 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.
> 
Thank you, that sounds really, really useful.

-- 
Chris Green