How to use UEFI | Every other YouTube video is WRONG!

in this video I'm going over UEFI in UEFI only I'm gonna make this very short and condensed and actually go over some of the misconceptions just so people have a better understanding what UEFI is in what it's capable of and how to actually use it so the first thing I want to address I actually did a video I'm gonna link it up here in the title card and also probably in the description below but I went over a UEFI verse legacy boot BIOS and then I also did a difference between GPT and MBR drives so that is a mouthful and I look it's probably one of my lowest retention videos just because people look at it and there's so many technical terms that you just get lost so I looked over all other youtubers to see exactly who else has made videos on UEFI and most of them haven't done a very good job of explaining UEFI or what it is so I wanted to kind of break it down because there's really three parts to UEFI that I kind of want to explain the very first part I want to explain is the BIOS in your computer when you first boot up and you go into that shiny screen or it's old dot blue screen whatever it might be that is UEFI or a legacy BIOS so that's just the BIOS though a UEFI and legacy BIOS and newer ones have you know Mouse control all that when it has a mouse you know it's UEFI when it has really advanced graphics you know it's UEFI I bring this up because it's important to know hey usually any computer bots in the last five years has that and that is one difference between UEFI BIOS and legacy BIOS so that's just the BIOS though so then you need to actually boot into an environment to install an actual operating system to install UEFI you have to boot from a UEFI enabled USB Drive now almost every installation media out there has the capabilities of doing both legacy and UEFI you got to make sure you force your system to boot into UEFI if you don't and you install that operating system it will be installed as a legacy BIOS operating system which means it won't be UEFI enabled so having said that a great way to test before actually installing the operating system if you can drop to shell if you're doing a linux install I'm gonna go ahead and cut over to shell on here and I'm going to show you a couple commands so here is two methods of checking to see if you've actually booted into UEFI and it's super important to do before you try doing any kind of grub installation or any bootloader installation in a Linux install so from your command prompt you will simply just list LS space and then type in this path it should return results now if you're not littering the UEFI when you do this it'll just say no files found or it'll just be blank so very important to know one other thing I really like to do as well is install something called EFI boot manager or MGR so how that looks is just do a sudo command you have to be super user to use it and type EFI boot manager after you've installed this particular package right here so either app get it or well you know whatever distribution you're on you need to install that package and from here you'll actually see hey I have Manjaro that's this Drive and I also have another UEFI hard drive that I can boot to I apparently did not label that but as you see the Manjaro is the first in the boot order and that other drive is the second in the boot loader now the cool thing about this is you if I allows you to actually dictate the boot order directly here so using this EFI boot manager I believe I can actually change the actual order that you're going in so very very powerful stuff definitely remember these two commands or write them down when doing UEFI so those were the commands actually to determine if you booted into UEFI this is extremely important before doing the full installation just to know that you forced your computer to use UEFI I highly recommend in BIOS settings disabling any legacy BIOS enforcing UEFI before starting any operating system installation this makes sure that operating system is installed in UEFI mode it comes to Windows it's much more guesswork going on as you got to make sure you're booting UEFI Windows installation media and there's no real good way to check or at least not that I know of so having said that you've booted and installed your operating system now when you install it and you get to the bootloader portion of it when it does its bootloader it will install by default an EFI or a UEFI capable bootloader which is great this can be done on any kind of disk and that is UEFI in a nutshell but one more thing I wanted to address is large drive support can you have a large drive on an old legacy BIOS installation and the answer this is resounding yes so almost every computer like I said I started out the video and said every computer in the last five years has UEFI and legacy capabilities well that means they do have the capability of recognizing large drives so I wanted to show these YouTube videos to kind of go over this because it's really important so I grabbed the top four videos on YouTube this is about a minute thirty seconds long and I go over four videos and I just pull snippets from each one that has UEFI on YouTube and kind of you can see where all this confusion comes from now all these youtubers aren't necessarily wrong but they're not right either I want to just make sure the one thing that you pick up from these videos and you should be listening for is is the drive GPT if the you tuber does not tell you that says hey if you need a large drive you need UEFI that's not true UEFI on old systems make sure it has the capabilities but it doesn't necessarily have to be installed as UEFI so confusing you can do legacy and then do a GPT disk and that disk could be six terabytes and it will still read it and it will still boot from it you just got to make sure the operating system supports booting from GPT so that's just the disk drives and it's very important to know but I'm gonna go ahead and roll this one minute 30 second clip UEFI can also recognize larger storage drives it's a firmware that can boot from hard drives of 2.2 terabytes or larger due to using a GPT partition instead of the MBR the system that a conventional BIOS uses to access your hard drive or SSD called the Master Boot Record or MBR could only handle partitions less than 2 terabytes and that was fine for a long time but with many modern hard drives holding way more data it became obvious that something new was needed the unified extensible firmware interface or UEFI which no one can agree how to pronounce was born the benefits to you fi is you get advanced graphics for like let's say your bootloader wants to do a fancy background and have icons for each one of your boot drives you can easily set that up in a UEFI and also there's greater support for large boot drives now in that same vein you'll probably want to use GPT and what that means is that's the partition table so when you first plug in your drive you'll get a prompt that says hey do you want GPT or MBR you'll get those prompts and if it's a large drive it needs to be GPT otherwise the largest partition you can make is two terabytes so that was the clip and I have to say it's it's one looking back you know I did that video two months ago which is kind of funny but it's some really good content in there but it's very easy to talk in circles when it comes to talking about UEFI and GPT vers MBR just remember UEFI and legacy boot UEFI is controlled one at the BIOS level is at UEFI compatible almost our all new ones are and then when you go to the installation media is it booted into legacy boot or UEFI and then when you install the operating system it is dictated by that second layer and then the operating systems boot loader when its installed will be under UEFI or a legacy boot kind of thing so just very very important to know and then as far as large drive support just know anything over two terabytes you're gonna have to load GPT on it if you want to do a big our Titian on that drive otherwise you can use MBR and just carve it up in the two terabyte segments however that's just hard drives it has nothing to do with UEFI and legacy boot as all these youtubers have said even myself said that and it can be kind of confusing and I wanted to just make sure to stipulate GPT is the one that controls the size that that drive can go to but having said all that I think this should give you a lot better clarity of how to actually utilize UEFI and the reasons why you'd want to so just just know UEFI is mainly for those out there that want to have a graphical interface for their BIOS where you can put a nice background and it also increases it actually decreases boot time those are really the main benefits is a little more Flair a little more eye candy and then also a faster boot but there's really no other reason to do UEFI you can do legacy on a big drive and most of the videos out there kind of make it seem like you can't I think in the beginning of my video I said hey these are just kind of guidelines not necessarily rules you can't break and I wanted to do is make sure that you guys understand that because it's something that is easily lost in the shuffle and most people get confused on that's gonna do it for today's video guys please let me know what you thought of it in the comments section below and if you liked this video consider visiting me on patreon and with that said I'll see you in the next one [Music]

Channel: Chris Titus Tech

Views: 153,670

Keywords: chris titus tech, uefi, bios vs uefi, what is uefi, uefi explained, what is uefi boot, bios, gpt explained, windows 10, what is uefi and legacy boot, uefi bios, what is uefi firmware settings, legacy, what is bios, unified extensible firmware interface, basic input output system, mbr, gpt, guid, post, power-on self-test, firmware, bootable, flash, rom, cmos, how to use uefi mode to install windows, how to use uefi firmware settings, how to use uefi bios, how to use uefi

Id: dn9rXk-rKYo

Length: 11min 39sec (699 seconds)

Published: Fri Mar 01 2019