If you’ve ever come across a situation where there is a need to change the boot device then this document explains a step by step procedure with screen images on how to get this done. There are situations wherein the initial boot device selected is of less capacity and later there is a need to change this to something bigger one. So there is no way to increase the size of this drive since the next block device which is usually “/dev/sda2” starts from the sector wherein the “/dev/sda1” ended (*considering installation done in default mode). Hence, we’ve to plan to move all the boot files onto a new, bigger block device and make that as a boot device.
I’m going to document each step with screenshots in this post which would help anyone who wish to perform the job of changing the boot device.