Ill start w saying I am quite new to linux and, on the side trying to learn more about it while studying for Comptia A+. I have been building windows PC's for about 15 years or so. You dont know how much you dont know until you start to study and see how much you dont know. (lol) I recently installed Linux Mint alongside my Win 10 and wow. I now get a boot option with Mint booting first and the option to boot into windows. I like this. I then went and installed Centos on a second drive after setting the bios to boot from USB stick. After removing the stick it now boots to Centos automatically and gives me options for Mint and Win 10 with a couple of other options. This is fine too. My questions - Is the boot loader all in one place like my first drive w windows and Mint or is it on the second drive and if so, is booting altogether now dependant on the Centos install?