I have installed ubuntu-mate on hdd (sdb) and i'm gone clone it to a new ssd .
With Timeshift i transfer / and /home from hdd -> ssd.
I do have another ssd (sda) with manjaro.
I want to be able boot from both of disks for security reason.
Booting sda grub display sdb-> ubuntu.
After install / & /home to new ssd the command to put grub is:
sudo grub-install /dev/sdX
in my case
Thanks in advance.