Hard Drive

[GabrielGroverMan]

i'd love to see this with a high frame rate camera! its so frik'n fast!!!! how does it do that?

[JohnnyX50]

@GabrielGroverMan the voice coil actuator is very much like how a speaker works in your hi fi. The sound produced is caused by various voltages oscilating at given frequencies to produce sound in a paper cone. The head/s on a hard drive have a set of very powerful magnets to help keep it in a given programmable position using the same method., voltages and frequencies fed through its coil to define its position.

[GabrielGroverMan]

@JohnnyX50 thats amazing, thanx for the info sir.

[dodgedart74]

how did monkeys create that? it kinda looks alien, if you were to see that for the first time, you would ask why? and how? in so many ways, but because this technology is up our ass all the time we dont even care

[GraspingReality]

YOU STILL ON THIS SHIT?! Like I said. WORKS LIKE A CD. case closed. THE FUCKIN END!

[dodgedart74]

negative, its more than that ,that hard drive has to have its own computer to run all those functions at once just to create ONE major output: make permanant memory, a cd just spins and the lazy laser reads it as it goes to it, this hard drive is timing the speed of roataion timeing the server and the pickup/transmitter, all to within a VERY VERY quick amount of time. and to be able to hop from one posision to the next like that and still have incredible stoarge speed is simply ...incredible

[GraspingReality]

Well then go and have sex with your precious hard drive.

I still think the hard drive should be obsolete and computers should use flash memory.

Using a hard drive for computer memory, you might as well just store the info on audio tape.

[JohnnyX50]

@GraspingReality Information is stored in flash memory as tiny microscopic 'fuses' which are broken (0) or linked (1) these kind of memory chips can only be written to a number of times before the links become un'flashable' and are therefore only suitable for long term storage where information is not required to be updated continuously. Standard RAM uses continuous power to refresh the on/off state of transistors, which obvioulsy lose their information if power is lost.

[ongame]

coool video!

[jtel]

Wow how cool! Thanks for posting this!

[jperelli]

Great video!! I made almost the same thing with a software i created, you can see the disk doing some seek algorithms (scan, sstf, fcfs, etc)

I uploaded a video that shows it in action

I used the IDE connection, and moved disk's arm to a specific cylinder using system calls. How did you move it?? I don't see any data cable... I really like to know.

(Sorry my bad english)

Bye!

[Zest07]

caralho o.o

[jsj24uk]

I bet Bill Gated is shitting himself after a statement like that.

[lamitpo]

LOL XD

[littlegamer725]

wrong vid :P

[kandish]

why is this wrong, i think it´s awesome, i learned so much!

[nerdy1351]

Awesome! Didn't notice that at first.

[alexchrisccc]

thats cool.

[RDCPCGUY]

easily..  It has the pwoer hooked up.. It only needs bower to run.. the IDE cable is used to send and recieve data.

[jay52592]

How did that Hard Drive work with no IDE cable pluged in?

[JohnnyX50]

@jay52592 The video explains its a demo. The procedures are hard encoded into the hard drives rom on the drive circuit, which you cant see in the video as it is under the drive casing. =]

[xXPUN1SH3RXx]

@jay52592, How did you make a comment with no fucking clue? Moron.

[Superthijs92]

@jay52592 IDE is for the data transwer, you only need Molex cable when you're doing this.

[boxa888]

what are the tracks, saveing tracks, music tracks, data tracks , i didnt understand that part. still very cool

[jaydog209]

were did you get the clear top thing

[my83merc]

Soooooo... this is a boot up test? or did you plug the data ribbon into it after the camera tracked away from the data port?

[produKtNZ]

"delicatessen", Would you have any idea why the harddrive is able to do this with no data connection going to it?

[KaiAdin]

Its doing a test demo, so probably this a demo hard drive programmed in its firmware to do that.

[TetrisMaster512]

The thing in the bottom left is a magnet...

[joyoskater]

wow this is stupid

i had to watch this in class

UGH!!

it sucks. dont waste your time with this

[tkktkt]

the guys who helped invent and refine hard drive technology must have had incalculable IQs.

[boxa888]

i know this is amazing, im sure they started really slow till they defiend the process to make it faster, but still ur right , i wonder sometimes , "how did they do it"

[JohnnyX50]

@tkktkt true. Its only a spin off from Tape Drives that use time information tables to locate files. Eg. File 'A' is located at 3min 16 sec. To get to file 'A' timing pulses are written on the tape and the hardware counts them (fast search) to get to 3min 16 sec then reads the data from there. A hard drive uses formatting, the OS writes the file allocation table to the drive and this is a known and stored variable that just tells the head to shift position to get to exactly the right location.

[markiex]

where's the hampster?

[Verkon1]

Your not from here, right?

[tiagonirvana]

you think this is fast??? watch my video of an 15k rpm HDD.

[mrbonaparte]

use a strobe

[meldoy1991]

Eeek, watching this kind of technology work makes me feel like a caveman...ToT

[HanakoFairhall]

That's amazing 0.0 There really is an amazing science behind hard drives o_o

[Astro29]

"jumping" as you call it is simply how the hard drive normally operates, it first reads the FAT (file allocation tables - usually in the middle of the disk) which tells it what position (tracks/sectors) the file is on, reads the portion of the data in that track sector, if the data is incomplete and the rest is located on another portion of this disk, it goes back to the FAT to retrieve the location of the next part, seeks to that sector/track, reads, and so on

[PeteAUT]

nice! i knew, how it works, but i've never seen it!!!

[nivin69]

definatly intresting.

[videogameknowitall]

Wow!...very cool, well explained, and acurate!

[bernlin2000]

I knew computers were amazing devices, but to see something like that is unbelievable. That thing is moving so damn fast! I can't believe it can move that fast at all, AND actually have enough to control to pinpoint small bits of information.

[newpaws]

stfu mofo im tryint to listen to it!

[witalit]

That is so cool. I never knew it was so fast! Praise the people who invented these!

[ellaskins]

Yes Interesting!!!

[JaidenUchiha]

Thats cool

I plan on working with computers when i grow up, so this stuff is very interesting :)

[helmus2000]

holy shit, that is sooo freaking fast

[AyashiiGaijin]

learning is COOL! very interesting

[lookigotanewusername]

that was pretty cool i acctually learned something today

[shyampatel]

cool

[BigPopa90]

yeah people thats the noisy sound u hear all the time:P

btw, how did they make it to do like jumping from a point to another like they wanted?

[boringjuice]

they probably wrote their own little tool that targets the sectors specifically, rather than looking for data on different tracks

[benitojuarezxl]

just your standard hard drive diagnostic program.

[JonathanMurray]

He mentions it's a demo program, not "normal" behavior.

[BigPopa90]

ohh i see...i must have missed that part..

[symetrixpc]

the banana shaped metal piece in the bottom left of the hard drive is a magnet. sandwiched in between it is the rear of the read/write arm which is an electro magnet. precise (very precise) changes in the current applied to the electro magnet cause it to move where they want, when they want, at very high speeds.

[fingah11]

I think I had a seizure :(

[WickedWumpus]

Now I see why defraging is so important.

[yaroen69]

I've never actually seen that before, even though I've been working with computers for over ten years :) Really nice.

[tkxg]

hey i never knew that. so thats what makes that noise when its prossesing things all the time.

[spikespeigel]

a hdd doesnt process anything it reads and writes data

[Heinekren]

No wonder those F*ckers cook all the time!

[CleanSlate]

Interesting.