Install Ubuntu - "Device for bootloader installation"

by Livy   Last Updated July 12, 2019 10:02 AM - source

From my understanding, the Grub2 bootloader can be installed any EFI System Partition (ESP), specifically under \EFI\ubuntu.

I have 2 SSDs - with 3 ESP on each of them (for testing purpose):

  • /dev/sda has sda1, sda3, sda5 as ESP
  • /dev/sdb has sdb1, sdb3, sdb5 as ESP

I wasted my time last night only to test the following scenarios for this bootloader installation option:

  • Mount a /dev/sda2 as root / and select the same device, eg: /dev/sda for bootloader installation
  • Mount a /dev/sda2 as root / and select the ESP on the same device, eg: /dev/sda1, /dev/sda3, /dev/sda5 for bootloader installation
  • Mount /dev/sda2 as root / and select a different device, eg: /dev/sdb for bootloader installation
  • Mount a /dev/sda2 as root / and select the ESP on a different device, eg: /dev/sdb1, /dev/sdb3, /dev/sdb5 for bootloader installation

image for illustration purpose, not my real test case

No matter what I select, the bootloader (\EFI\ubuntu) is always installed on the first ESP of /dev/sda drive - the same drive whose partition I mount as root. I'm tired and haven't tried mounting /dev/sdb2 as root, but I guess it will use /dev/sdb1 for bootloader in that case.

What is the point of this option if it always choose the first ESP partition of the same drive with root?



Related Questions




Acronis Extended Capacity Disk

Updated May 29, 2015 09:00 AM