How do hard drives work? - Kanawat Senanan
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- Опубліковано 28 жов 2015
- View full lesson: ed.ted.com/lessons/how-do-hard...
The modern hard drive is an object that can likely hold more information than your local library. But how does it store so much information in such a small space? Kanawat Senanan details the generations of engineers, material scientists, and quantum physicists who influenced the creation of this incredibly powerful and precise tool.
Lesson by Kanawat Senanan, animation by TED-Ed.
It’s so cool how we got from banging stones together to this.
😂😂😂😂
Lmfao
@@animationspace8550 WE MONKE STRONK, MONKE FUTURE
MONKE WILL PREVAIL
magnetize stones
?
I would like to say thank you.... to all those people who put their efforts in making this possible.
gratitude rocks. These ted ed guys are awesome!
That is our purpose as humans. To compound the knowledge and the hard work that has been done by previous generations, to make the future generations better.
Sadly they do it mostly for money instead of for your benefit
@@Der.Geschichtenerzahler It is a wrong perception. They do it for both benefit and money. They want to be the best in the market. And that is the reason we have good options with competitive pricing.
@@Der.Geschichtenerzahler Wow ur so edgy and cool. please tell me more about these greedy companies
My mind has just been blown. I am struggling to understand just how complex something that costs less than £50 is. And to think that it can play back video games is absurd.
Yep
Geopolitics, that's why it's so cheap.
- Zamazawarma
Haha! I guess so!
+-Boman an spoderman srik bick
No, bullshit, the true reason is economy developtment and free trade. The companies need to be more efficient each generation due to market concurrency. If we want more of these inventions, we need to support free market
Antonio Pedro Pedrosa
Ok, so why are you telling ME this? It was - Zamazawarma who spoke about geopolitical stuff, not me. But I guess you're right, although I'm not really into economics and money...
To all the scientists, engineers and physicists who made this possible and helped us usher a new era of information, we really appreciate you.
I wonder if there's a website that lists all of the names that contributed??
Did you forget to add a "thank you" at the end of your comment?
It’s sad that there’s a lot of them whose work changed the world yet they are unknown by most people
Explain SSD next, please.
+Benjamin Wilde pls SSD NEXT
Agree! I would like an explanation on SSD as well.
+Benjamin Wilde SSD Equals Solid State Drives? Asking just to be sure. Thanks Family member got a new computer a couple of months ago and it has a Solid State Drive
Lorie Franceschi Yes, SSD means Solid State Drive. They don't have a spinning disk as Hard Drives but I don't know about the inner workings of it.
Lorie Franceschi Yes, that's what SSD stands for.
2010: 500gb is a lot
2019: 2tb is awesome and 16 tb is maximum
2087: I’m rocking a 1000 petabyte SSD and a 2000 petabyte portable HDD from seagate
In 2087 we wouldn’t use any HDDs anymore, since it will probably be replaced by SSDs that are faster and safer
@@yeoldekrabs3436 it is possible that in 2087 data will be stored with superior storage technology. SSDs could be considered as oldschool by then.
@focus Yeah, right
@@yeoldekrabs3436 it would go mainstream if they can make them last longer than HDD's
I'm pretty sure owning an SSD in 2087 would be like owning a floppy disc in 2020.
This is one of those things that can restore your faith in humanity and makes you feel hopeful about the future.
Incredible video!
from the future: sorry to disappoint you, it is a no.
Really?? Technological advances in how much data we can store fills you with faith for humankind? - Ugh, damn techno-religious power trip is part of the whole problem.
@@Dowlphin Those 'technological advances in how much data we can store' directly cause lives to be saved. The field of medicine would not exist without technological advancement.
@@F255123 Technology is a con, a borrowed-power trip, externalizing it and thereby distracting us from developing our human potential. All too often, modern technology only manages the problems we only have because of that system that pushes it.
It is very telling that not even the gain-of-function scandal has taught people anything.
"how hard drive works" - they work really hard, all that drives...
Yo
@@Dr.Kraig_Ren tu
Ber
This vid really makes me realize how little I know.
That’s good! Me too!
You not alone
As a educational channel you should use metric system. Or at least both metric and imperial.
+Arrvi eh, they did mention a lot of metric measurements, such as 4 nm, nanometers are metric, since they're based off of the meter.
Metric is based off of universal constants such as planck's length, imperial is based off of common measurements from objects used in common living. Metric is based off of science, imperial is based off of human interaction with the world. While imperial isn't very good to do exact measurements with, it's easier to compare imperial measurements to certain types of objects are they are more easily divisible because the measurement is based off sizes of objects that are related. Personally i feel both have their place. I do agree that the metric system is probably better, but sometimes it's easier to use the imperial system when talking about specific sizes that may be 1.7683 of some size in metric. I guess it would be nice to say "x cm (or y inches)", I guess it depends on who's doing the talk though.
+DreadKyller I see your point. But for me, metric system is more intuitive as it is being used as only one in most of the world, including my country. Imperial is more intuitive for people who were taught to use it. In this case I'd still go for metric, because it's simpler and _can_ be intuitive. Other thing is mixing them. In this video some measures were given in inches only and some in metric units - that's even more confusing for both groups.
There's only one place where I can understand and accept non-metric systems - long distance navigation. I do some sailing from time to time, so I had to use nautical miles and knots. These are ok, because they are based on geographical coordinates and are easier to use with simple tools and a map which might be crucial in case of electronic navigation failure. I think it is also applies to flights.
I also know that discussion on this is pointless, so I'm not going to argue further.
+Arrvi I agree measurement system needs to be standarized, there are at least one engineering disasters and one airplane incident merely caused by the different measuring system that different engineers used.. e.g.: Airplane run out of fuel in mid air because they done their fuel calculation with pounds instead of kilograms while the calculating tools are expecting kilograms as unit..
e.g.2: Mars Climate Orbiter suffered unplanned rapid disintegration while performing aerobrake over Mar's atmosphere. Because one software NASA used to supply parameters to calculate orbit maneuvers supplied non-metric units while the orbit calculation expected metric units, the orbiter flew too close into Mar's atmosphere and is destroyed. Successfully converting it into a shooting star at the cost of 300 million USD.
However, I am not sure whether we should discard other metric system once and for all, because I am not sure what the side effect will be. Maybe those system are better than metric system at some aspect. I am just not sure, so I have no comment on that (not agree nor disagree).
Dennis Liu For fields like that metric is always used now, for those specific reasons. Even here in the US we use the metric system every time a measurement has to be precise or coordinated with anyone else, pretty much any field of science uses the metric system no matter where you live.
DreadKyller That sounds good =D, hopefully no more that type of disasters in the future.
It’s just incredible how MUCH data can be crammed in such a small space. We went from floppy disks with a whopping 1.44 mb of storage to 100gb hdd’s in less than 15 years
and now we have sd cards that are even small that hold a terabyte
Just wow 😲
We recorded computer games on casette tapes when i was young.
@@Quimper111 yea, I know (still use cassettes since i’m weird but never for data storage)
@@sloopy420 SD CARDS CAN HOLD MORE THAN 1 TERABYTE UP TO 2 TERABYTES EVEN
Technology is amazing, I'm so appreciative of the world we live in.
Wow, we truly are living in the future.
+Ethan Swords We just don't realize it because our concept of the future changes as we move into each "future."
+Matt Nguyen #deep
Ethan Swords ;)
Ethan Swords lol, I'm watching this in 2083 and, jeez, your technology is sooo archaic. You store 600 GB per inch? Wow... Today we use DNA cells to store information and you can store millions of GB on 1 inch. Oh, by the way, we don't usually use GB, we use ZB now. For example a regular holographic picture is few EB (exabyte) now.
Yes, turning human beings and animals into storage hubs as these minerals aren't enough. Well, this doesn't sound like technology, sounds more like globalization.
How.....................................I mean....How?
How are humans able to invent, or even come up with stuff like this?
+samy said through evolution. and from the knowledge from the past.
+Josh Hunt Ohhhhhhhhhhhhhh... thanks for clearing that up....
Intelligence
+samy said SCIENCE!
+samy said
Science and mathematics. Science is used to make discoveries on how our universe physically works, while mathematics (also a kind of science) makes discoveries on the correlations, connections, and parallels between logical and formal patterns and concepts. When you unite the two, you get magic....I mean technology.
Also, humans came up with this through centuries of scientific, philosophical, and _mostly_ mathematical insight. We stand on the shoulders of giants...
amazing. lets give a round of applause to all the engineers and scientists in the world
I have never seen such a clear explanation anywhere. Truly great job!
Man everything can be innovated to a while new level🤯. From being able to make 2mb ram the size of our modern pc cabinet to making the whole pc fit in just 2% of the space and storing millions of time more, it's just beautiful, how much humans have grown
What absolutely amazing clever people out there. Whom we owe so much to for the tech we use every day without a second thought. To all those generations of engineers and the current gen giving us SSDs, smartphones, GDDR5 , GPUS and so much more - thank you.
HDDs are practically magic. I’ve always found them super fascinating personally. The fact that we have technology that can store and recover a mind boggling amount of data on a small little disk that is spinning at a similar RPM to the average car engine is just incredible. What’s really cool to see is slow motion footage of an HDD seeking. In real time, the head moves across the platter in the blink of an eye, but in slow motion you can see it make precise, tiny little movements across the spinning disk to read and write data.
This is one of the most beautiful UA-cam videos I've ever watched in my life!
And me
Amazing! Nowadays, memory chips/cards roughly the size of our nails have storage capacity comparable to these bulk hard drives. Please make a video on their structure and working!
You prune,Hard Drives aren't that bulky
Watching this video after 5 years gives the same hit!
Imagine how far today's tech has reached 😯
Wow, its amazing how durable they are given how easily it seems that something could go wrong!
Quantum field.
this channel is the best educational channel ive seen, even though crash course helps with tests, i just like channel alot better
an inspirational ted talk for the thing that holds all my porn.
Brick Tamland The 1s goes into the 0s hehehehe get it?
icemilitia lmao
lol
👎👎👎👎👎
Dude
This really is mind blowing how well all of these things work, and how cheap they are to us all. We truly live in a remarkable time.
We still don't have flying cars, yet. Popular Mechanics from the 1950s said we would.
@@TucsonDude It's coming, but not until you start building 3D lanes for them 🤣 the idea of flying does not mean you can just fly however you want, still gonna have lanes and traffic lights (in 3D), and of course flying laws.
This is absolutely mind-blowing. I always thought they worked like a record by etching into it so I always wondered how you can erase data? Just jaw dropping how far we have come as a species
I cannot even begin to understand the fundamentals of how this stuff works. Ted Talks like these make me want to learn everything on the planet.
This was such an informative video! Hats off to the scientists who work day and night to make futuristic ideas a reality!
Generations of engineering, huh?
I think this is the time when gratitude hits me hard with kindness.
One of the best youtube video i have ever seen! Thanks!
This Ted guy been reading my mind lately...and i love it
all of this so that a pesky little boy could play GTA 5 on it...
0-0
*laughs in SSD*
@@MartynDerg
*laughs in SSD and HDD*
@Lord AB Dude you clearly don't even know what I was talking about, lol
And even if you do, you don't know what I meant! One guy cries in HDD only, some other guy laughs in SSD only and I laugh out loud in both SSD and HDD so I have high boot speeds and ****** but I also have a lot of space for games.
@@deadchannel5933 h
The people who suprised with how complicated it is, if only they knew how CPU works...
Understanding CPU isn't complicated though. It is just a lot of simple stuffs working together.
@@null5573 Maybe understanding it isn't hard but its work is much more complex and on much smaller scale than HDDs
Amused !! Science and contributions of decades,
and with background music I was in the flow.
A great video which provides learning for newbie in Computer Science.
thanks, this is helping me with my school research
Any of us, litteraly any of us, could of thought of that, most of would think its impossible, but it was made.
Thats the magic of human thinking, if were put our ape brains together, we could think of anything
I am literally blown away by all this so incredible
I just love this channel so much that i have to somehow give youbsomething for it ahhhhhhhhhh im so happy because i found this channel of useful information
Fascinating, thanks! I thought the background music was a bit loud and obnoxious in this one, though.
That was the best Ted-ed video I've ever seen. The production quality was phenomenal. Definitely wear headphones with this video to get the full experience. Great Job!
That intro is ridiculous, fam!! I'm super impressed! 😮
Really how this people had made this nd how we take this for granted , really grateful for such invention. Hopping are lifetime easier.
loving the music
y u no metric ? At least on screen...
I still don't understand why in 2015 people still don't use metric.
+NaXter24R 'murica.
+zaviusfirerave Well Screw Murica! inches and miles are stupid.
+Campmus I think what mr McIntyre meant to say is that it is silly to take pride in an antiquated and arbitrary system when the rest of the world is moving towards rationalisation and cooperation
+Luca B Customary STUPIDER than metric
I need all the attention I can summon to understand this. And appreciate it.
Thanks a lot. I can't express how much I like these videos! ;)
Great episode, but the music was a bit too loud and distracting at parts.
+Frank Dantuono I was going to comment the exact same thing... The music volume was WAY off for this video!
how do solid state drives work
yes..comparison video, for flash,solid extc.
+TheCorey Marks SSD's IMO is like a flashdrive with more storage and improved speed.... but the process would be "less" complicated than the HDD's since it has a moving mechanism that has to sync with the read and write header not to mention the "magnetic" thing part...
Think of it as a box with a large SD card in it. That’s basically what it is because they both use flash memory and don’t have any moving parts lol.
Much more simple in operation, but harder to manufacture.
such precision I can't fathom how this came to be
I’m literally holding a seagate barracuda 1TB HDD in my hands while watching this video to see how much technology has evolved thanks to generations of scientists.
So wait, what happens when you delete stuff, does the HDD backtrack and somehow demagnetize the bits to clear more space on the disk?
No if you delete data the disk doesn't actually erase them, It just marks the area on which the data is stored as being free. Until it actually overwrites it with some new data the "deleted" information is still there. This is why some software can recover your data even if its been deleted.
But if you use a "shredder" software, it more or less erases data permanently by overwriting multiple times on the bit.
I assume that "Shredder" software you mean would just corrupt the data beyond any possible means to recover.
Defrag the drive to actually overwrite the deleted data. Format and fill with new data if you really want to delete something.
Very informative reply from you. Thank you. But what about those disks that come in as new? the data areas are neutral? or it has been randomly charged?
It's amazing to see that information stored on a hard drive is still physically there and it's not just some magical information stored in some magical plane of existence. It's just so small it's invisible to us. Absolutely amazing
Thank you for making the only video that answers my question!
More than true and Great information .
I was scrolling when reading the thumbnail and I understood, "how hard, drives work?"
Is it weird that I almost cried watching this? Together, we build better, stronger and more advanced world.
Don't worry.
Monke together stronh
I don’t know but i would never cry about how a disc works
So much information packed in 5 minutes
Perfect video! Thanks so much for explenation!
all hail Science !!!
HAIL SCIENCE!
hail hydra
Hail science
Science is over rated.
@@used_tissue3536 as you might see in the video, it's not..
"Dad, can I have a hard drive?"
"Go back to hell where you were born"
Second time watching, still learning. Good work sir.
It was too easy to understand it !! Thanks TedEd!
The MR effect
music so loud(
but good do
What?
how the fck should i know
Конечно
Welcome to ted-ed
My head hurts after so much knowledge
If that's the case, then Ted Ed is not for you.
my entire brain just escaped from my head, been cahsing it now.
Thank you so much! Being an INTP, it was fucking frustrating to find a single source to explain the basics in a simplistic fashion. You guys are amazing!
It's absolutely staggering that this technology even works to me! Never mind the sheer innovation and mind boggling leaps and bounds that it's come in 60 odd years. Hats off to the people who invented this stuff. To all of them, thank you for your astounding minds.
it would be nice that these videos embrace the SI (international system of units)...
- now i know why my hard drive make a spinning sound whenever i connect it XD
- so basically a picture is made of 0 1 bits... so does video.. but its moving... *mind blown*
- an HD picture could take 20Mb and above.. can you imagine how many bits are there x___x
Video does not really "move", it's a sequence of pictures or frames.
20MBytes equals 160000000 bits.
Look at how videos are encoded. They dont even use multiple pictures for it.
Thanks to the TED for great experience with quantum magnetic effects
Its just amazing to know this for the first time.
What about an SSD?
4:41 he is talking about fidget spinners not hard drives...
Lmao, thanks for the 10 second laugh
Haha
Loool
lmao
@@rhonenathaniellapas560 I read this back to see if it was cringe being 2 years old and all. Actually was funnier than I expected
I never thought i needed to learn this. I am happy
the first time i clicked this video i knew it would be crazy but i didn't know it would be THAT crazy. totally mind blown!
But Solid State is so much-MORE BORING!!
NUTHIN'Beats Fine Mechanical Engineering :D
The HDD aint goin'NOWHERE anytime soon ^_^
My current 3Tb External Hard Drive is not enough for me.
Where's my 20TB Hard Drive???
I want it NOW!
+Ferman Sensei IN 6 YEARS OR LESS
+Ferman Sensei I want a 20TB SSD :p
+Ferman Sensei wow bro,ive using a 160hdd for 4years and counting and ive only used up less than 50gbs,just imagine how long a 3tb would last me
TRO LINU I do UA-cam and a lot of my other work on my PC. I actually have a bit over 3TB in total and trust me, it burns up quickly. It also doesn't help if you are a gamer lol
+Entrt4inment OR a Professional Editor
I remember back when I was 8 years old (1995) my “big” hdd was 500Mb and it felt like I’d never use it up. Now I’m 950Gb deep just in my iTunes library and I feel like a 4Tb hdd is not enough. How times have changed huh.
Trust me I used my 1tb HDD on my PC within a year of having the PC for me I need like 500 Yoddabytes (I don't think I spelled Yoddabytes right)
that is absolutely fascinating!
I shed some tears. Thank you engineers! Because of you, I can play skyrim with mods.
HDD : I HELPED HUMANS FOR MANY DECADE .
SDD : *ok boomer*
Imagine slow speeds for file transfer
This post was made by m.2 ssd gang
Imagine losing all your data when the SSD breaks
This post was made by Hardrive gang.
finally i found a detailed video how the magnetic bits look a like and how it works. thank you
WOW. I've been thinking about this for a long time.
Hold on while I go change my pants.
+Schoolidge
good , I´m not the only one who jerked out on this .
sapiosexuals
How about a usb? Is that working the same way?
+D88888888Mc Flash drive like USB, SD and SSD are a totaly different thing: there are'nt any moving parts.
*+D88888888Mc* USB is an interface, not a storage medium. You're denser than a modern hard drive.
+D88888888Mc They use flash storage, the same storage SSDs use, a lot of the comments are asking for a video on that, I'm interested too, I know it uses differences in voltage levels throughout its many small circuits to store ones and zeros,
Very good explained.
Thank you for video.
Keep it up
Great explanation. Thanks a lot
It's 2016. Baby boomers will whine: _"Where's my hovercar? Where's my robot butler? Where's my freaking jetpack!?"_ at the drop of a hat.
When they do, I show them this. Computer technology as it is today is SO much more advanced and "futuristic" than a jetpack or hovercar. It's so futuristic that no one even saw it coming!
It's 2018. ua-cam.com/video/fvu5FxKuqdQ/v-deo.html The future is soon, my friend.
Ok boomer.
yay scientists.
John Dough what about engineers?
Thank you TED-ED
Good work
its amazing how someone thought of this and created ot, like wow.. even a power button if you think about it is amazing.
Narrator: ...60 GB per in^2
Me: In normal units, please.
In^2 means you take a point and either move right OR left after every inch until you reach where you started. Basically it is area of a square. And we fit 600GB in 1inch^2. That's pretty badass. By the way it is in normal units.
@@bathtub_farter No, in metric, not your freedom units.
@@bathtub_farter Because It would be handy to understand the size of these measurements without having to do math. 95% of the world already uses metric, so cooperate already.
Murica wont cooperate
@@mambodog5322 yup, would be nice to be able to imagine it
please turn down the background music in your next video. bad soundmixing
blame your harddrive. :p
I agree. I had a hard time hearing his voice. And not all of the videos are like this.
+Reãuvi M. get a better set of headphones or speakers, i can hear it just fine.
Thank you for the innovation
I asked my teacher about this and she said "it is like how your brain remembers". And i said to her "i dont know that too!". Then i went to my biology teacher and asked how our brain remembers. She said" its with the help of neurons" but i dont know how neurons do that! I know they take and give electrical pulses or what ever but that doesnt explains how they "save" that memory. So i just gave up cause teachers doesnt know about this. They just learn what ever they learn and never question it. Then try to teach us.
I swear to God UA-cam videos are more educative than school.
what i dont get is....how do they make such things when the components are so small you cant even see it with you eyes...
Amnesia Microscopes and magnifying glass
Not microscopes or magnifying glasses. It's mostly through properties of chemistry and physics.
Yes, but with microscopes or magnifying glasses.
Nano technology
Laser
Like a plane that circles the Earth, then shows a hard drive's flat disk. Earth is Flat Confirmed.
Completely Mindblown.
mind-blown! great video!