Booting an Operating System

A high-level overview of Booting -- the process by which an operating system is started on a computer. The presentation discusses some of the design principles underlying the BIOS and the motivation for the approach used for the booting process.

[@shrishtiagrawal6640]

the only video that could explain the whole process properly,...thank you so much!!

[@sherelhayes4234]

I love the simple laymen explanation for the non technical person like me to understand. Thank you.

[@5430amit]

You are making really very intuitive & logical content sir, please keep it up and Thanks for this.

[@ManishaSharma-hm3np]

Absolutely perfect explaination. I have been looking for simple details, like about what does MBR have and it's connection to /boot/grub/grub.conf. This video is wow. Thank you thank you.

[@mohanvvip]

"jump drive" LOL! Haven't heard that so far, in which part of the world do they use it? Good explanation - how about a detailed explanation of the specific boot sequence for Linux and Windows? Thanks.

[@corbul9225]

Very useful and well explained, thank you

[@menachemlevi]

just beautiful explanation

[@mamad_f1471]

Good presentation. It's really helpful.

[@wand3rlust_nature]

Actually, I have studied that The CPU doesn't get instructions from BIOS, in fact when the device resets, all its registers are set to zero except Code Segment(CS) which is set to (0xF000), and Instruction Pointer (IP) set to (0xFFF0), e.g. the first instruction that the CPU has to fetch and execute is already hard coded into the CPU registers by the manufacturers and it points at physical address CS+ IP (0xFFFF0). So the first instruction is fetched from location 0xFFFF0 is a jump instruction that instructs the CPU to jump to the ROM BIOS location.

[@zetton6952]

great explanation 👏

[@upasonabiswas6783]

Thank you for this:)

[@jianliangge2174]

Really like it!

[@marcwharton4803]

Good job sir!

[@Sabrina-xq3gq]

I just started but very encouraging.

[@balasubramaniansellaiah4877]

Thank you sir

[@erfangholizadeh]

this was some good video on booting!

[@jyothishkumar3098]

Also, a small BIOS is necessary because you'd want the OS to be opinionated and have its own bootloader. And a small MBR (or now, EFI System Partition) is required because it should only really store the stage 1 bootloader. A partition table such as MBR Partition Table or GUID Partition Table is required for a storage device because every OS will also want to have its own filesystem format, and you may want to have multiple filesystems, but the BIOS/UEFI should not have to know all of them. The reason the MBR Partition Table can only recognize 4 partitions as primary is because it was designed to not use too much of the disk space, at a time when disk space was a premium. So everything is sensible 🙂.

[@johnswarezThepvper]

thamks!

[@cocplayers4459]

Ty sir

[@rajchavan1276]

Are the boot loader and bootstrap loader the same.... because I got a question in my test which had both the options.... Please help someone

[@Skesov]

thanks

[@yuhaohan1451]

May I ask what is the textbook mentioned on the first slide?

[@afrouja6073]

GREAT

[@amanithota6717]

Tqqq sir

[@ikaeksen]

@ Dhananjai Rao, in the video at 8:22 you mention boot loader loads OS into memory...do you mean memory as in RAM?

[@soyabghanchi2056]

yes...it loads required kernel and programmes in memory....does not load entire os

[@LiamC328]

@@soyabghanchi2056 so... memory as in RAM.

[@guogeorge7956]

I am cleared now!

[@williedavis3966]

I owe you cup of coffee thanks

[@ehouaiscestdwiouaiscestbie2528]

thank youu

[@anthonytitan4113]

Can you provide me the boot loader images that you used in the video?

[@mariajack-qs9et]

bravo

[@Lou_Tube]

Hey dr.kleiner what does a computer do when you press the start button

[@AvikNayak_]

Sir can you please share the slides so that we can study from it.

[@Er.Sunil.Pedgaonkar]

Discuss OS for Supercomputers & Distributed OS -- Er. Sunil Pedgaonkar, India, Consulting Engineer (IT), India

[@MotoMichiganVlog]

Good video but please give this man a glass of water cause mannnn...

[@LiamC328]

Ok, and who came up with this? Why is it done in this specific way and not in other?

[@olgakust4536]

Good question about it and I think you can develop your own booting strategy for your own systems

[@schifoso]

IBM

[@rcsdiary]

It was difficult to focus on the information due to the forced accent. Please try to speak normally

[@kpk331]

Lots of piggy smooching

[@schifoso]

Pretty close.

[@xuanattran3778]

thank you Sir