Hard drive teardown

[RefurbishedBacon]

Hey Bill, when do you think they'll reach the physical limit of how much data can be stored on a single platter? If it all has to do with how close the head is to the platter, then surely it must be hard to squeeze any more capacity out of a single platter. Seems to me the next step would be some crazy nanotechnology, assuming flash storage just doesn't take over by then.

[lookkool3]

so if i take apart my hard drive and rub a magnet across it a bunch of time will it lose any data on it?

[MrCarcallas]

0:28 I think that he said "look at that its markless" but when I turned the captions on it sait "look at that its marvelous"

[thingbobthingz]

what?

[53iBro]

Well it was very interesting. And thank you very much for reminding me why I didn't go into engineering.

[Konraden]

Why pick an old Dell Dimension? Find that in a junk-heap somewhere?

[engineerguyvideo]

@Konraden Yes ... we got it from campus surplus!

[Konraden]

@engineerguyvideo Those Dimensions are a dime a dozen. Love the videos! Look forward to more--incandescent filaments blew my mind!

[HawxTeamDelta]

uh.. are we talking about the hard drive :S

[TheAwakenedHeretic]

Wow that was well done.

[lichto2005]

EXPLAIN EVERYTHING IN MY HOUSE TO ME! Your content is so intriguing, and even though the material in itself is not super entertaining, the polished look makes me enjoy learning about it. Love it.

[HatTalk]

I feel like Towlie watching this

[moomeraver]

>the home computer is a powerful tool

>Dell Dimension

Stopped watching there.

[wiggaroo]

So at the end, basically, its all down to probability and the computer deciding which outcome is most probable? That's unnervingly clever.

[BBP854]

I'm not sure if you do videos by request, but I'd love to see ones on Solid State Drives as well as LED monitors. All your stuff is great and easy to follow.

[TheKnight254]

Mark Hamil? =O

[Matttix]

It just blows my mind how any human being can consider this not interesting. It's so amazing it moves me, like art.

[AlexLong1000]

@Matttix I find this very interesting, but it's not hard to realise why some people find it boring

[KenArrari]

It just blows my mind how complicated this stuff is.

I can barely even comprehend what's going on, and at some point someone actually sat down and built this stuff.

It's beautiful.

[AsmellyLinguanian]

lol i lost him a 4:46 :S

[AGrandt]

Harddrives are unnoticed until something goes wrong. then everybody in the vicinity notices...

[thegreenpikmin]

i dont understand any of this :D

[LunaticAzyLhomme]

prml is pretty impressive

[JakobiaP]

The graphic of the lorenze force is somewhat misguiding, it's not really visible that the cable moves perpendicularly to the magnets rather than approaching the magnets, otherwise: amazing videos

[pickleV3]

this is absolutely amazing! thank you for explaining it so well!

[HypocriticalElitist]

This is quite an information-dense video, and I mean that in a good way.

[Menuki]

What'll really bake your brain is everything he's explaining is happening to make it possible to see him explain it.

[SoldierDDR]

The first usefully video. thx

[babydash123]

you sir are the best tech explaining guy on youtube. we want more :D

[KrunchatizeMeKapn]

2:03 Faraday's Law? MICHAEL FARADAY! WE HAVE TO GO BACK KATE!

[Zale59]

THIS,IS,CONFUSING!!! *kicks the hard drive*

[thirdworldcountry33]

Magnets, how do they work?

[zOzZyxPiEz]

@thirdworldcountry33 actually thats a good question. Magnets are able to act a force without contact. To explain this to us, my physics teacher told us three things about it: 1. "We don't know"; 2. "It's MAGIC!"; and 3. "When scientists don't know the answer to something, they invent a 'lie' to explain it, so we made up electromagnetic theory".

[Coasterdude1432]

i like the fact that i have the same model of the computer that was used.

[vshierdom]

The head is not aerodynamically designed, it is tribologically designed. Aeronautical vs. mechanical engineering.

[CountdeAll]

at the end of the arm lies the most critical component... the arm. LOL

anatomy- Study it

[wstevenb]

It's mind-blowing that we can create something so sensitive to detect such a tiny field fluctuation.  It's still beyond my comprehension, but thanks for your video outlining the underlying principles. How does the head write information to the disk?

[AlwayzHilarious]

This probably had like 2 views b4 vsauce found it

[winner4455]

@AlwayzHilarious Nah, this had tons still, I remember :P

[O0oStarBurst]

not this guy again!

[BKMarcelus88]

subscribed

[username951100]

i wish i was smart ._.

[nlesiak3]

holy shit man...this video gave me faith in mankind, how to people figure this shit out!!? and furthermore, make it so cheaply mainstream?

[bputra13]

can u teach me about how ssd works and how a micro sd card works

[eCedie]

can you be my dad?? ;0

[SgtAwesome6]

MAH BRAINZ! ITSA HURTIN!

[Apotcheon]

why do they compare everything to a footballfield!!!!!!!!!!!

[SportsNewsNow]

wat.

[110ih]

human brain... gotta lovem

[ichigouchiha1523]

WHAT IS THIS WITCHCRAFTERY?!?!

[95operation]

i had that computer! Dell is a great brand! lasted almost a decade!

[eprohtwagwerdna]

I AGREE.

[PBTtheClan]

0.0 Magnetic.... are you able to eat those disks?

[lennic95]

@PBTtheClan wtf?

[animekittycatgirl]

i feel like an diot compared to this

[MrEradash]

Very nice :D I used this video for one of my big project at my school :P

What is the music ? because it's very cool xD

[TargouniusKILLER]

... SUCH COMPLEX SHITZ EXPLAINED SO SIMPLY :DDDDDDDD

[straighter100]

0.0

shiny......

[deadspacer47]

does the top layer with a lot of tiny copper looking dots matter? please respond!!!

[engineerguyvideo]

@deadspacer47 Give me the time code for the section of the video you are referring to and I'll do my best to answer.

[kipper09100]

@engineerguyvideo

hay my hdd has a small cable its not a ribbon cable.

what tyoe of hdd is it?

it doesnt say

[dudehoorox97]

@engineerguyvideo i think he is talking about the carbon overcoat

[TheSwanies]

@deadspacer47 Yes. It is the controller

[I0N36O]

science hasn't even move from a different form since its upbringing

[I0N36O]

so basically this is like some super record player

[Naruto73176]

we're using a device with a hard drive to find out about a hard drive. RANDOM.

[evilmonkeykillbot]

better than science bob

[h4shd1]

mechanical hard drives.... this is so 1956 :P

[sethboy66]

HE OPENED A HARD DRIVE WITHOUT BEING IN A CLEAN ROOM D: well i guess he just murdered it :(

[TheAlbHunter]

Funny how he looks just like the engineer from Team Fortress 2 :D

[nalby92]

they trick their own techs :|

[fcc323]

omg i have the same comptuer but i have 2 disk drives :O

[Eiversed]

confusing but cool 

[datguyoverthere7]

NERDGASM!

[silentsniper441]

lol my old dell sounded exactly like that any time you started up a program

[Edwardtehgreat]

Why the hell is Nicki Minaj in the suggestions?

[danplat13]

I HAVE THAT MONITOR.

[grayswandir47]

Excellent video. Does anyone still use induction based heads? I thought they moved to MR and GMR (Giant Magneto Resistive) where the magnetic flux doesn't induce current, it changes the resistance of the head allowing a source current to flow through the head. Second, didn't the boffins start making the platters out of glass about ten years ago?

[TheRedYellowOrange]

And I thought I knew it all about hard drives... I guess not lol

[jmxbox]

Faraday's law?

LOST wins again

[ericfam01]

what about steady states?

[engineerguyvideo]

@ericfam01 What would you like to know about steady states?

[ericfam01]

@engineerguyvideo Well, this video was extreamly interesting, but i was just wandering about the diffrences between these hard drives and the newer steady states. =)

[slashwhobadshaman]

@engineerguyvideo how do steady states differ from normal hard drives? :D awesome explanation on hard drives!

[frankis94]

@engineerguyvideo probably how they read data with no movement...

[FauzanZaid]

@engineerguyvideo How they work

[bikeous23]

@ericfam01 Steady state drives work completely different from hard disk drives. Pros: They are completely silent, less susceptible to physical shock, faster access time, and have no moving parts the memory is all flash based. Cons: much more expensive per gigabyte, and have a limited number of writes.

[ericfam01]

@bikeous23 i know, but i would still love to see the inside of them =)

[MetroidSammich]

@bikeous23 And would make for a less interesting video. :p

[BlackVest25]

what happened to the clock

[SuperCheezyGuy]

Cool... You can remix this...

[engineerguyvideo]

@SuperCheezyGuy Correct! It is released under a creative commons sharealike 3.0 license!

[SuperCheezyGuy]

@engineerguyvideo Yay me!

[engineerguyvideo]

@SuperCheezyGuy The question is whether it "Yay" for me too ... we'll find out! ;-)

[JCCTAPIA]

This is old technology, the present is flash storage

[iChinnyAce]

SO WHATS IN A MAC?!? O_O

[Pix3LatedMassacre]

@iChinnyAce shit

[72metallicafan]

@iChinnyAce the same exact thing. a mac and pc are the same. just have different names and look differently.

[iChinnyAce]

@72metallicafan oooh ok, Thanks! =] I just learned something today.

[Jamonkatrunk]

open a solid-state hd

[UnboundxREVIEWS]

WITCHCRAFT!

[GraydonW]

SSD next!

[Craisant]

After that a drop of spit came out of my mouth

[Sephirothz667]

the question is, will it blend??

[hootypatootie]

Wow, whoever made the hard drive needs a bonus.

[headsmash10]

wah!

[Forssa1]

Do a video about flash memory please.

[lillbrorsan]

How does a SSD disk work?

[silverkiller1945]

could you translate this for layabouts and leanbackers?

[vampiregirl423]

i just read the comments though the whole video :)

[SupaShang]

"Spy sappin my hard drive!"

[lancermasterx]

WAHT

[stupidnamehereT1001]

cool



[finaltrinity5]

faraday's law....Daniel Faraday from Lost?

[nellgoose]

@finaltrinity5 haha i was totally thinking that!

[brownsound5150]

i don't even.

[cperalta92]

Such complexity and beauty. Makes me feel like an asshole for dropping one of my hard drives 2 days ago.

[moltenclay]

wow i get it

[raph0renzoo]

ha that hard drive would die if he spat

[M4CAZY]

my brain died



[proffninja77]

I finally understand!! yes!

[BloodSpatterGaming]

@proffninja77 yeah sure you do! LOL

[proffninja77]

@BloodSpatterGaming whatareyoutalkingaboutofcourse­ido. Actually this made sense to me. :) It did, it really did.

[uberman709]

did the drive still work after this episode?

[thetpwrules]

@uberman709 It would have worked for a little while, but the dust that got in the drive would eventually interfere with the heads, causing them to crash into the platters resulting in data loss and destroying the drive.

[vArctiiC]

wait... what?

[NeedU2Subscribe]

im so confused



[madbar4lifexo]

magnets! How do they work?!

[MrSunnycat9]

that cool and i get it too

[johnn771]

WHAT IS THIS SORCERY?!

[shadowsgrl36048]

@johnn771 WITCHCRAFT!!!!!!!!!!!!!!!!! NOOOOOOOOOOOooooooOOOOOOOOoOoo­ooooooooooooooooo!!!!1!!!one!!

[Salir]

OH!!! =O

[TheCheezyHobo]

its just like listening to busta rhymes in look at me now i dont get it

[vk2zay]

Great video, few people give hard disks a second though, they just work and store more and more data every year.

Modern drives use giant magnetoresistance based head sensors well in the nanotech region of fabrication technology and pack data using very clever multi-level coding. Amazing machines, the servo mechanism is incredible, as is the software and coding system that lets it find a handful of bits in the 30 trillion or so on the latest drives and they do it within 20 ms. All for < $200.

[matson36]

So the Harddisk Active Protection System stops the current to protect the harddisk not damage by the slider?

[XJerel]

now I won't hit my computer...

[RebootEDC]

Oh, BTW, Bill forgot to mention the name of the effect that keeps the head floating: The Bernoulli effect.

[RebootEDC]

Absolutely great, like all the other shows. Bravo, Bill.

[1jcrobins1]

oh well there goes my brain exploding into tiny little bits

[StormLight13]

wow I never knew.....and it makes my trusty old computer seem so fagile now...I trust the engineering, but seeing it broken down like this, now makes me realize I shold stop putting off backing up my files...lol

[MrCarlr7]

this is an amazing video. CARL

[mantasvonclick]

At the beggining that is my old PC. What memories ♥

[AgentTunaghost1]

@mantasvonclick Same here. GOD, that thing sucked.

[GunsOfMusic]

OMFG I UNDERSTAND IT

OMFG OMFG

WTF

IM A FREAK D:

[xCEOLINx]

When magnetic domains are shrunk for more space and "Partial Response Maximium Likelihood" is implemented, does the code that determines the best likely match for a frequency cause more overhead in terms of computing time?

[AmaterasuHusky]

That's so cool!

[samuelstolin]

Bill Hammack, I love your videos but in this video you only explain how the hard drive writes information, you only covered how it reads it, I am also curious about wether HDDs can write and read information at the same time, if so, how?

[Alexagrigorieff]

@samuelstolin

A HDD can NOT read and write at the same time. Even though it has separate heads for multiple surfaces, only one of them follows a selected cylinder at any time, all others are inactive.

[enemybowtie]

i remember this guy from a previous leanback

[Scruffie440]

i could watchi this like 8 times high and still lve it

[MrAln602]

Another great video! Its amazing how something so complex has become so cheap lol

[joethefuckinpro]

Looks like a turntale.

[darthesgoobis123]

am i the only one who understood it???

[DehNuke]

OH! I TOTALLY UNDERSTAND NOW!

[xxJonh316xx]

simple cxc physics i love my country's school system :)

[Lalariela]

i'm acctually learning something!!! this day was not a total waste!! =]

[gotenbfp]

sweet now explain an SSD plox

[snomimons]

0:10 Yeah that hard drive is pretty much dead.

[TheAwded]

Hmm...nice video! Even knowing already how a HDD words, still learned a few details.

[artsyfartsy1998]

Omigod, I actually UNDERSTOOD SOME OF THIS! LE GASP!

[TheDJVAQ]

i skipped most of this one XD

[BlueCrayolaMarker]

omfg D: My mind is full of FUCK!!

[QluisQl]

1 nanometer anyone?

[Supzer101]

Why is COMPLEXITY! getting the the highest comments in leanback #6?

[TEpro125]

how smooth? sooooo smooth o.O

[TripleKekkon]

Amazing! I learned more with this video then I do in my homeschooling C:

[IAreCrazyChris]

110101011100001010101101101011­110010010011100000101110011011­000011110111000111110101011100­01010.

[KindomOfHappiness]

@IAreCrazyChris According to some binary translator, that translates to: Õ­¯$๰÷W

[IAreCrazyChris]

@KindomOfHappiness 01011001 01100101 01110011 00100000 01100001 01101110 01100100 00100000 01001001 00100000 01101101 01100101 01100001 01101110 01110100 00100000 01101001 01110100

[123456789Anarchy]

but will it blend???