This is by far the best visualisation of HDD work. We didn't have those fancy visualisations at school when I was learning. We were using our imaginations to get the idea of how thinly it magnetises and reads those 1 and 0. Now someone has put it in visual form. Thanks.
@TheMadisonHang2 жыл бұрын
and then, just think of what it takes to make this technology
@pabodhafernando37912 жыл бұрын
1. what is the mechanism that is used to prevent the heads crashing on the disk ? 2. what is the mechanism that is used to move the actuator arm ? 3. each track is divided in to what smaller unit ? 4. what is the name given to each 1 or 0 is called ? 5. what is the main mechanism that is used in the hard disk ?
@TheMadisonHang2 жыл бұрын
@@pabodhafernando3791 it only takes one person to understand it for everyone else to use it
@user-uz4gh7sm9l4 жыл бұрын
From now on I'll bow down to my laptop each time I use it.
@kl96862 жыл бұрын
Do you still bowing down to your pc until today? Hi.
@user-uz4gh7sm9l2 жыл бұрын
@@kl9686 reverence has grown multifolds, now I have offered myself in Its service.
@Shake_Well_Before_Use Жыл бұрын
@@user-uz4gh7sm9l wow
@HerobrineLolz6 ай бұрын
😂🎉
@AwesomeRobot157 жыл бұрын
This is so amazing, everyone should watch this to appreciate the things we use everyday.
@popyfx25997 жыл бұрын
Porta dos Fundos np im using ssd's brah
@youbox2536 жыл бұрын
i use ssd .....
@popyfx25996 жыл бұрын
AwesomeRobot15 i dont have a hdd i only use ssd
@anawsmperson6 жыл бұрын
Popy TV ssd dies faster than hdd
@deedr12346 жыл бұрын
This is from science channel.
@eyesweyedopen45994 жыл бұрын
This was the grooviest walkthrough of a hard drive I've ever seen. Thank you for changing my life.
@Megadriver7 жыл бұрын
Truly an amazing piece of technology that none of us really appreciate enough... You go out and buy a computer and you look at cpu speeds, graphics cards and want more and more ram, but never give the hard drive much thought... Says X terabytes on the brochure and that's it! It's even more amazing how quickly technology is evolving... I remember when I was a kid, our first computer (1997) at home had only a few gigabytes of disk space. Now, 20 years later, the tiny memory card in my phone has over 15 times more space!
@lastyhopper27923 жыл бұрын
And they designed it to be so compact, stable, precise, and also very unlikely to fail
@vendetta39537 жыл бұрын
what a masterpiece of accuracy and engineering
@Dullfang23 жыл бұрын
Amazing video. I had faith that somewhere on KZbin there would be a video taking us inside the hard drive to explain everything. Thank you. I understand now
@msgcheckout8 жыл бұрын
truly amazing technology, guess what gave it birth, yes the good old fashioned vinyals and audio magnetic recording, as well as floppy disc drives.
@jaywalker70848 жыл бұрын
Thumbs up, but obviously subject to interpretation, I'd say the punch-card was the start. And, as a fun fact, was used by Hollerith (DuckGoGo "The Hollerith Machine") who's company was later renamed IBM :)
@msgcheckout8 жыл бұрын
To compare how tiny the bits are, you could fit a 10Mega pixel picture on a size equal to a sperm head, now for those who don't know how big that is, there are 10 million such heads in a drop. Now you can imagine how small is a bit. (Please don't take it too seriously some people have thick sperm heads and you would only get one sperm head per testicle :-)
@burg3r7 жыл бұрын
samdomding and now the created the special ssd as known as solid state drive, Jesus what's next floating computers?!
@rjbarns12 жыл бұрын
Great video, thanks! I looked at most of the other videos on how HDD works here on YT and this is by far the best one.
@chronicsynergy4 жыл бұрын
"at speeds that defy comprehension" imagine when this guy saw an ssd for the first time
@mammamia24183 жыл бұрын
XD
@notsoseagatey6 ай бұрын
Bro this video is old - sure SSD existed but isn't common.
@gavingalston864410 жыл бұрын
Okay, so it said that 1 square centimeter on a hard drive holds 31 billion bits... So a hard drive with a 3.5 inch diameter x pi = about 11, x 2.5 (inches to centimeters) = a 27.5cm hard disk. (Squared) 27.5 x 31 billion bits = 852500000000 bits, or a 100 gigabyte hard drive exactly. with hard disks in the terabytes now, a 2TB harddrive would be able to hold 620 billion bits (72 gigabytes) per centimeter instead of the 31 billion (3.7 gigabytes) when this video was made. But nobody probably cares.
@Daniel-cz9gt10 жыл бұрын
*1.75^2 x 3.1416=9.62 x 6.25 (SQUARE inches to square centimeters)=60cm^2 60 x 31,000,000,000=1860000000000 bit=232 gb.
@josephkreifelsii65967 жыл бұрын
I've taken apart over 50 HDDs in my life. I'm seeing that the older larger HDDs had 2 disks, while the newer larger ones use 1 disk. They've managed to fit 2 disks of information into just 1 disk.
@joemama0697 жыл бұрын
Logan Strong i didnt understand anything but okay
@phantomnebgaming7 жыл бұрын
as part of your observations were true, some can't be translated into real world hdd manufacturing. not all of the surface area of the disk is writable/readable. factors like extreme diameters such as the inner and outer diameters have so many noises that the actuators can have problems reaching its position and affects performance. also there are spaces in between tracks and sectors that are left blank during recording to avoid interferences during magnetic recording. you computed the whole disk and forgot that a large piece of the surface is also underneath the center cap that connects to the brushless motor.
@midinerd7 жыл бұрын
620 billion tiny violins just started playing at 60hz btw
@mohdipgajera51126 жыл бұрын
When you realise that your movie is nothing but only 1 and 0 😂😂😂😂😂😂
@Ablequerq6 жыл бұрын
😂😂😂😂👌👌👌👌
@shazan18 Жыл бұрын
esoft guys 🙋♂
@Thariya735 ай бұрын
😂❤
@artfulharmoniesАй бұрын
Yeah 😂
@AmaliPriyadarshani-p4n29 күн бұрын
Yes
@liontech801327 күн бұрын
Yes 😂
@DinushiPrabodya-lq2sz25 күн бұрын
😂💗
@juliencrn7 жыл бұрын
WOW WHO INVENTED THIS? much complicated than it looks i feel dumb now
@cobrasvt34712 жыл бұрын
this is the best example of hdd operation i have seen yet, professionally speaking its very acurate
@ComandanteJ12 жыл бұрын
Does anyone else find this really inspiring? Shows off how magnifecent we are, and makes me want a time machine to see what we will have 100 year in the future.
@taniyadiwyanjali3062 жыл бұрын
1. What is the part of the name, that holds the Read write head? 2. What is the mechanism that use to prevents the head crashing on the disk? 3. What is the mechanism that used to move the actuator arm? 4. Each Track Divided in to? 5. Each 1 or 0 is Called a type of? 6. What is the main mechanism that use in the hard disk? can you answer the questions I ask ?
@Ahamed-gk1hh Жыл бұрын
can you help me in this to answer
@kona70210 жыл бұрын
@ 1:06 ....YES THERE IS FRICTION. Things that arent in direct contact doesnt mean they dont cause friction on eachother. The movement of the air at 80mph is an example of this friction. If there was no friction, the drive wouldnt work...period...beleive it or not the HDD REQUIRES friction to operate correctly and within specs...
@darinb.32734 жыл бұрын
Consider this if it wasn't for the AIR FRICTION... the heads couldn't float ... so compared to ACTUAL CONTACT... yes it is for all intent and purposes a frictionless environment ... can't forget the spinning disks either they cause the air to move inside the drive as well (thus the cushion of air between the heads and platters)
@giancarloprado82063 жыл бұрын
SSD has join the chat. HDD: I'm a joke to you?
@kotai200315 жыл бұрын
the best presentation for understanding HDD.
@ramiBudemaris12 жыл бұрын
why i feel i want to cry after watching this , that is impressive.
@rajibroychowdhury42029 жыл бұрын
Its awesome........Hats off to them those who made this......
@tubebility11 жыл бұрын
A slick presentation of the balancing act it takes to maintain such systems that we take for granted. I was reading about the problem (of capacity) with commercialising the Laser HDD vs Magnetic HDD. The problem was, the laser uses 5 microns, while magnetic uses less than one. So, I looked up micron vs centimetre, and laughed my head off just thinking about such microscopic scales. Here is another presentation about microscopic scales (in time): watch?v=mfgsQX78hg8
@OnyxCrow876 жыл бұрын
This is a cool video documenting classic hardware.
@GlobeRoad12 жыл бұрын
The data on the outer edge of the disk is read and/or written faster than the inner edge of the disk since the outer edge rotates faster than the inner edge.
@kona70210 жыл бұрын
Wow the 747 analogy made me chuckle...what an EXTREME example of scale comparison. You have to be realistic and to scale for these types of comparisons...
@luckycat51078 жыл бұрын
because the read write head only floats nanometers above the disk and because the read write head is smaller than a piece of Hare and because of the speed the read write head is heavier than it looks also because of the positive and negative which represents on and off or one and zero which the computer can understand
@truth-12345.9 ай бұрын
Man, the complex engineering they have to design in order to make this device in reality, and now it's slowly becoming obsolete.
@parveshkhatri10274 жыл бұрын
This is called seriously hard worked video . Salute
@DaveBabler8 жыл бұрын
This is great but it really needs to be updated for proper HD viewing.
@papalouie55174 жыл бұрын
Dude this was 11 years ago
@Devcasteel7 жыл бұрын
That pun at the en made me groan. But it was amazing!
@DonaldMurf3 жыл бұрын
I went and found this because in 2021 my DF teacher was using folded paper towel and a dry erase marker to try and explain how mechanical hard drives work. Man, what value I get for all the tuition I pay...
@slagboy98122 жыл бұрын
Isuru sir nisa balanna awe sago 🇱🇰 😌❤️✨️
@zaker62574 жыл бұрын
Still, an awesome and awing piece of technology!
@KiwiPowerNZ11 жыл бұрын
even 60 years in the future there will only be boring SSDs with no moving parts :( and you'll be saying, back in my day your files were stored on magnetic disks!
@BharathKumar-ip7gg3 жыл бұрын
Really great invention
@RayMysteryo5 жыл бұрын
my brain just frickin exploded .. feels good feels good.. its been a long time
@micmwaura15 жыл бұрын
very nice explanation...nice commentary
@Laughing_Cat_Meme4 жыл бұрын
11 years after this comment 🤗
@ziadfreshgame85533 жыл бұрын
مرحبا انت ٥اكر التعليق دة
@andresbudihardja3 жыл бұрын
if HDD head problem can solved ? i have drive can detect but not spin & incorrect function message after choose initialize disk use MBR in disk management
@rencrawx94913 жыл бұрын
I had this urge to disassemble my hard disk upon watching this video
@_tanzil_3 жыл бұрын
*I wonder who is that genius made the hard disk 💿 first time* Salute to him..😎
@natashavaughan86883 жыл бұрын
That arm control is what controls online roulette
@cursory90314 ай бұрын
props to my lecturer for sending us this video
@andic66765 ай бұрын
Amazing presentation
@nagualdesign12 жыл бұрын
I remember a diagram from my computing class at college which showed the space between the head and the disk compared to a single particle of smoke. It looked like a football next to a letterbox!
@mike79589 жыл бұрын
WTF is he talking about when he compares the head clearance to a 747?
@RClass7199 жыл бұрын
The read head never touches the disk, it floats above the disk with only a few nanometers clearance, so the narrator is using it as an analogy that when the disk faulters and the head hits the platter, the damage done to the disk is similar to that of a 747 crashing.
@mariusfacktor35979 жыл бұрын
Michael Hancock That's a stretch
@seekter-kafa6 жыл бұрын
not really, he compares sizes, it is like 747 is flying at 60miles per hour only half an inch (or so, i dont remember) from the ground!
@methane135 жыл бұрын
@@seekter-kafa yeah 1/100th of inch above ground
@prostocheck Жыл бұрын
fucking jump scare in the end of an unholy vacuum cleaner.
@devonds3388 Жыл бұрын
Thank you from esoft ja ela😌
@DulenDesilva-x7z Жыл бұрын
👍
@incubusholic12 жыл бұрын
@voidofdeath dude, that video said, "One high quality photo can take up 29 million bits" the right math is 29000000/1024/1024 = 27.65 KB 1 KiloByte = 1024 Byte 1 Byte = 1024 Bit
@demogaming88952 жыл бұрын
"speed that defies comprehension" and yet, now it's one of the slower storage types
@Bandicoot80315 жыл бұрын
A cigarette smoke particle does NOT fit in the space between read/write heads and platter, it would easily jack up the head.
@haroldplaysminecraftharold82747 жыл бұрын
So basically, hard drives are like old jukeboxes from the '90's(or '80's) but with a circuit board that keeps the 'disk' rotating every minute without stopping (except without electricity), btw i have a question, does overclocking a hard drive speeds up its spinning speed? just asking..
@pabodhafernando37912 жыл бұрын
1. what is the mechanism that is used to prevent the heads crashing on the disk ? 2. what is the mechanism that is used to move the actuator arm ? 3. each track is divided in to what smaller unit ? 4. what is the name given to each 1 or 0 is called ? 5. what is the main mechanism that is used in the hard disk ?
@thidastheekshana7358 Жыл бұрын
Anzwers
@chanidunimsara905 Жыл бұрын
😂
@Emi_Ama3 ай бұрын
Esoft campus tutorial questions 😁
@قناهالاسطوره-م1ه3 ай бұрын
I have a disk that makes a clicking sound and is not recognized by the computer. What is the solution?
@javadkazemi99132 жыл бұрын
hello I have a scartched hard disk platter problem. my hard disk is wd 4 tb.could you please recommend to me a service place to repair the hard disk? Tanks
@connorwiebe61110 жыл бұрын
i still dont understand how 1s and 0s actually take up physical space
@connorwiebe61110 жыл бұрын
why cant an infinite number of 1s and 0s fit into one "magnetic cell"?
@connorwiebe61110 жыл бұрын
why do they store the 1s and 0s in magnetic cells? Why can they only hold one 1 or 0?
@HighAway10 жыл бұрын
n00b_asaurous excellent answer. it made so much sense if you look at how you write code in C++
@mariusfacktor35979 жыл бұрын
Connor Wiebe They are interpreted into 1s and 0s at a different hardware component. At the disk hard drive the only thing that is imposed or read is the positive or negative (or north or south) charges of magnets. The atoms of the disk orient their positive side towards the head component when the head has a negative charge. The atoms stay in this orientation so that they can be interpreted as positive facing or negative facing until they are rewritten. The positive or negative (also called north or south) is what becomes the 1s and 0s later. You can't get more than two outcomes with magnets. It's either positive or negative so computers decide 1 or 0.
@khushalashani7 жыл бұрын
Bravo for the explanation!, I study Computer Science and found this enjoyable to read.
@GamezGames199 жыл бұрын
Hard drives are amazing pieces of engineering compared to those damn floppy-hoppy SSDs!
@gluestickguymusic90126 жыл бұрын
Lucas Kroon lol
@xJaAviiEeR5 жыл бұрын
"....BIT... BY BIT..." worth the watch till the end
@Smartzenegger Жыл бұрын
Question: Does the heads get more lift at the edge of the disk compared to the most inner track of the disc or not?
@PinoyPogiman13 жыл бұрын
So thats why i feel my 5th gen Ipod classic vibrating
@xmdude6269 жыл бұрын
The question I have is, how do all these tiny magnetized particles stay perfectly lined up don't jump or move around since we know that like poles repel and opossite poles attract.
@christianaranda94266 жыл бұрын
There's a layer on what they called heads or what we called slider. Maybe can see it with a 400x magnification.
@ocheinoderrick56203 жыл бұрын
I have a habit of cooling down my external hard disks using a cold wet towel. It really works well. Temperature can drop from 52'c to 42'c in just 3 minutes. Is this method safe for the hard disk?
@peterkago72283 жыл бұрын
I once disassembled a hard disk and still have the disc and circuit board
@Daniel_Page2 жыл бұрын
and this is just the beginning
@krazyhartin3 жыл бұрын
Compares the spindle head to an airplane flying 0.001" from the ground, with enthusiasm. Gives minimal info on how the head WRITES data onto the PLATTER.
@msgsgt12 жыл бұрын
if i didn't know better i would think that steven job and gates were aliens
@Awcator Жыл бұрын
What an engineering marvel
@MyBuxJT13 жыл бұрын
how are the bits made when its too small for us to even see or do anything to make it
@MUSICWORLD-rg4uk2 жыл бұрын
What is the mechanism that use to prevents the head crashing on the disk?
@hotswap_tofu50873 жыл бұрын
So that is why hdd sounds like a jet. With 100,000 passengers
@OscarLodge12 жыл бұрын
Very good... Iv'e always wondered how the HDD works... some staggering facts there too.. brain baffling .. Cheers. !
@ChappyBT12 жыл бұрын
You're confusing Analog storage on magnetic tape (cassette, reel-to-reel) with HDD magnetic storage. HDD's are magnetic storage devices of binary information. The only thing you are correct about is that the info is not stored as 1's and 0's, they are stored as positive and negative, which is read as either a 1 or a 0. Analog storage was similar to a waveform in that a stronger analog signal was reflected by a stronger magnetization of the tape, making the magnetic field appear as a waveform.
@voidofdeath12 жыл бұрын
@incubusholic Wrong. It's actually 3.457 MB.
@serialglobetrotter10 жыл бұрын
difference between constant angular velocity and multiple zone recording???
@deiu999911 жыл бұрын
wow. I`m so amazed! also, great video... it`s explaining so well.
@sayori39393 жыл бұрын
Every hd's a gangster untill the number 2 appears ...
@sayori39393 жыл бұрын
But seriously this video was incredible!
@starstudio84023 жыл бұрын
2?Wait what-|insert blu screen here|
@sayori39393 жыл бұрын
@@starstudio8402 this may sound a bit ironic but can you explain my own joke because it don't remember it after 2 months 😄
@sayori39393 жыл бұрын
@@starstudio8402 oh I remember now! 😅
@arcanum-a3 жыл бұрын
Wow this was amazing
@faltolegends57686 жыл бұрын
Its really amazing and informative one
@tristantrezise51027 жыл бұрын
this is pretty nifty
@mixeddreams87313 жыл бұрын
It's fascinating.
@HHJHJFDSSDFF11 жыл бұрын
Honestly, it may sound super revolutionary, but HDD are quite impractical/bulky/fragile devices.. They are too complicated for the task at hand. At the rate computer tech has been evolving today im surprised solid state drives haven't been the industry standard for quite some time now. When i think of the amazing tech used in all other components, than think about the HDD.. something about a physical spinning motor/disk just seems so ancient to me. SSD needs to get up there!!
@batvenio35336 жыл бұрын
It is really unbelievable :)
@PudgyOrange12 жыл бұрын
great video!
@dannyh87507 жыл бұрын
its fun because it is going so fast i mean an collega of mine showed me his old hdd it was a whopping 700MB and now i have laying around a 4TB disk and you can get a 10TB disk today
3 жыл бұрын
I need this vid in higher quality. Can Discovery channel digitize and upscale it to at least 1920x1020? I know even a photo upscaling is hard to do without quality loss, not to mention video quality upscaling. But this video nails it by summarizing the HDD and explaining how the needle magnetizes the disk. I can show needle on the projector screen, explain by saying and waving my hands, but I'd rather demonstrate this instead. As I understand, this vid might be gone one day since it belongs to Discovery Science, while the channel author is ...
@programming91049 жыл бұрын
i am 22 years old and i love this topic :D
@1sonyzz8 жыл бұрын
+programming 24 years old and love it too
@リンゴ酢-b8g2 жыл бұрын
Hard drives typically have several platters which are mounted on the same spindle. A platter can store information on both sides, requiring two heads per platter. en.wikipedia.org/wiki/Hard_disk_drive_platter
@axelkakasho Жыл бұрын
Ant to think that nowadays this thing is considered slow.
@shupesmerga46945 жыл бұрын
when you thought that programmers are awesome then you thought of the people who invented this.
@anuradhapillai79524 жыл бұрын
Exactly
@johnyvico3 жыл бұрын
All from alien technology The rosewell crash
@TheAbderaman9 ай бұрын
despite the HDD is amond the most complex tecknology of engineering it is not a valuable for long therm storage for archives , because it demagnetises by the time high quality CD's can live up to 30 years protected from humidity
@abundantharmony2 жыл бұрын
How did you post this without a strike?
@xmdude6269 жыл бұрын
So the head magnetizes tiny particles to 2 different state, N to S or S to N. How do all these magnetized particles don't interfere with one another since there's billions of them.
@stoatwblr9 жыл бұрын
+xmdude626 "spacing" or "density" - hard drives are now at the point where it's difficult to pack the magnetic domains any closer, which is why we now have "shingled" (SMR) drives (which overlaps tracks. Great for archive work but lousy for anything else) and "heat assisted magnetorestrictive"(HAMR) tech - which mounts a laser on the read/write head to zap each spot to a higher temperature for writing. Both technologies are problematic and by the time they're perfected there's a good chance Solid State Drives will have overtaken them in both size and price.
@luckycat51078 жыл бұрын
+stoatwblr fat or file allocation table
@gato0317 жыл бұрын
Electricity and magnetism are the same type of force
@gato0317 жыл бұрын
Moving charges produce magnetic fields. Magnets are materials with a natural magnetization due to those moving charges generally speaking. The expression of the electromagnetic force differenciates the magnetic and electric term as a result of historical tradition. The general property of matter that produces the force is the charge , in both cases
@atillaattila89004 жыл бұрын
Thanks for good information
@pakan3577 жыл бұрын
Ah, that sexy HD4870...
@limitless16928 жыл бұрын
is is the best video aboud hdd by far
@anns6666 жыл бұрын
nowadays everybody uses ssd's but hdd was a cool thing, i miss the noise