Will a Magnet Erase my PC's Hard Drive? - Let's Find Out
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- Опубликовано: 26 янв 2019
- If I get too close to my PC's hard drive HDD with a magnet will it get damaged or destroyed?, this is something I always wondered about so I decided to try it on one of my computers and the results were both surprising and interesting.
I also try the same test on a Solid State Drive aka SSD.
here's more info on why a modern HDD Hard Disk Drive is very hard to damage with a magnet: superuser.com/questions/98323...
I have read that old floppy disks were very easy to damage with a magnet but we don't use those anymore. 
Развлечения
"minecraft, that should eat up some cpu" (9% CPU Usage)
that's because he's using the shitty Bedrock version that's meant for use on phones
Lmao
It was a bedrock editon it i's bad
Bedrock edition is better.
@@HaydenH lol nope
However I don't think playing minecraft is the best to see if the hard drive is working. Cause the game is already loaded on the RAM. Interesting video none the less.
The world save file is probably not fully loaded in ram... And there are probably other things that is not loaded in ram and will stop working If the bed is not working...
You're right, I should have actually transferred a large file like someone else said in this comment section. But I know it is still accessing the disk constantly and I didn't have anything else on this computer.
*HDD not bed... Autocorrect
In Minecraft closeby world chunks are loaded to RAM when world is opened. One should move few chunks to some direction in the world to make Minecraft to load more chunks from hard disk. @@misaalanshori
@@kepa219 that's what I thought too after realizing he's not moving the character, but there's probably _something_ that's not loaded into ram.... Right?
The strong magnet, dont kill the disk data, but this magnet is interfere for reading head i guess.
True that
Hdd have neodinium magnet it
Pistolero it kills everything
The magnet can move the position of the read write head, they only have around a few millimeters of space between them & the platter
the write head automatically close whenever it sense strong magnetic field that could collapse the plate and the head,Most HDD today have that ability
I think what happened with the strongest magnet is that it pulled the disks up towards itself, making reading and writing impossible.
It actually has to do with the HDD platters being made out of Aluminium and spinning at high speed in the magnets magnetic field, if you do a search for magnetic field effect with Aluminium, you will find a lot of videos and research on it. the basics though is while aluminium is not magnetic, it does interact with the magnetic field of a magnet and will act as a brake for a spinning disk of aluminium or if you just try to slide a magnet down a sheet of aluminium at a steep angle.
@@byte6d653 no it was just the fysical shock from the magnet hitting the hdd. A hit with a stone would have had that same effect. The readhead on the arm skips some tracks and the hdd has to find his track and required speed for it again and thats all of the delay, all thats seen here.
maksphoto78 no it just interfered with the reed switch that makes the drive spin at correct rpm
@@byte6d653 Eddy's current
@@byte6d653 I see, thanks. So the magnet stopped the discs spinning.
Copy files instead of playing Minecraft, it’s a tiny game it could all be cached in memory. Otherwise good experiment.
Windows itself would hang up if the hdd does not respond, minecraft would be just a indicator of the usability of the machine. And as shown when it dies, minecraft died too, no matter if its cached on ram, because it depends on the OS itself, and actually world generation writes and reads data from the hdd a good part of the time anyway.
the game limits itself to 1gb of ram that it can use, (you can see that as a preset in the launcher) the game itself is actually a little bit larger, While maybe not the best game to try possibly not the worst
@@stormy4752 i use 6gb ram for Minecraft
How small is it?
Yes, I'm an absolute degenerate peasant, gloss over that for a bit
Stormy he’s using bedrock, its meant for,phones and it’s bad
Pretty sure you're talking about the movie "The Core"
Yes, for the life of me I couldn't remember the name of the movie. That's the one
Same movie where the hacker got the guy unlimited long distance "for life" by blowing into a gum wrapper while on the phone.
Really, how did that work?. I'll have to look that up, I don't remember that part
@@WarpedPerception oh yes lol ruclips.net/video/A2ghcYF_R-0/видео.html
Haha I remember that phone part, I think he wrapped up the chewing gum wrapper and whistled into it...then was like you have unlimited phone calls lol
The biggest problem is the impact when putting the magnet on. This can cause a head crash
Well according to the label on the hard drive, the warranty is void if the hard drive experiences impact shock of more than 350 G's , I highly doubt not a magnet hitting the drive will exceed 350 g's of shock. I'm not going against what you said but that's what the label says on the drive.
Interesting, maybe that applies to a stillstanding drive? During operation, a shock is way more problematic.
That reading must be for unpowered disk. Remember my friend accidentially dropping an AA battery From 30cm to HDD and the drive died..
@@Petex90 I'm pretty sure that's a server grade drive, so it's a lot tougher
if he turned it off first so disk not spinning would have been better
Hard drive
*heavy breathing*
SSD master race.
SSD master race.
Lol
They dont breathe they spin instead say "heavy spining"
Dang. Now if only I could afford one
There is a neodymium magnet inside a hard drive, so it should erase everything all the time if you think like this.
No no no no. That magnet is properly placed to prevent interfering with the platters.
the magnet is placed in between two metal holders which stop interference
Yeah, but it's out of the way of the platter, the most the magnet can do is move the head the way it's supposed to...
Those magnets also usually have a special double polarity configuration that makes the magnetic field generated much smaller.
Modern HDDs have magnetic domains on the platter that are too small and powerfully magnetized to affect with typical permanent magnets. If you are looking to destroy the data in a way such that it positively cannot be recovered, you need to physically destroy the platters. Thermite works well for this purpose, but just putting the drive in an oven that can exceed the curie point of the media will do quite the number on the magnetic domains on the disc (even if the drive remains otherwise intact). SSDs, being more-or-less immune to static magnetic fields, would require thermite to totally destroy.
That's exactly what I learned here, thanks for the info. The funny thing is that before I did this video I went to the computer store to buy an SSD, I told one of the associates that help me that I had a magnet to close to my hard drive, just messing around, they all jump and said oh my God your data is going to be destroyed you need to be very careful. it was at that moment I knew making this video was a good idea...LBVS
Or, just stop the disc from spinning
UselessDood - if you really want the data GONE, that won’t work: the platters can be transplanted into another mechanism and read. Granted, this isn’t a threat scenario for most people; but if you have nation-state level adversaries... 🤔
@@darkwinter6028 that's interesting, I'm working on a how to video where I show how to remove the platters and put them into a new drive to recover data. I always knew that was possible but have never seen it done.
or just hit it with a hammer you fucking mad man
-I can feel the hard drive working-
*Are you powered up by hard drives?*
Mal McKee
Issa joke
" You Say Run "
The disk slowed down when you put 40lb magnet over it due to developing of eddy currents in the disk which tried to oppose its rotational motion
Naw it slowed down and would eventually stop because it's triggering sensors used for fall detection. ThioJoe did a video where he was shaking hard drives in use and it exhibits the same behavior of freezing and queuing up requests for when it detects everything is fine again.
@@ConcernedCitizenPPCA as far as what I know, when fall detection sensors are triggered then the read write head would move away from the disk and park itself. But in the video it didn't.
Aha, the old “Rare Earth magnet while playing Minecraft in a garage” test. A classic to be sure.
Lenz's Law. Though the Aluminum platters don't attract the magnet on their own, the magnet induces a magnetic field in the platter, attracting the magnet and creating resistance (slowing the platter). Similar to how if you drop a strong magnet through an aluminum tube, it floats slowly through on it's way down. I guess the harddrive senses the slowdown and pauses activity until the motor can spin it back up to normal speed.
Are those platters aluminum though? I thought they were silicon....
@@WarpedPerceptionMy quick search earlier said that most desktop use Aluminum and smaller drives for laptops are glass. I guess it just depends on the manufacturer and quality of the drive. I'm guessing the glass ones wouldn't slow down much.
@@WarpedPerception Silicon in a disk shape is typically used as wafers for semiconductor-based integrated circuits, including CPU/GPU dies and memory chips among other things. These get manufactured through lithography and cut to size before being packaged, conditioned and sent to users of those chips (like RAM stick manufacturers.)
That's why there's no need to use silicon for a platter that's not used as a base for semiconductor technology. The platters are coated with a magnetic film, so it can be pretty much anything that retains this coat at high rotation speed and isn't magnetic. Aluminum can fit the bill.
@@michaelsteinbach Glass? There is something wrong there...
they are not aluminum platters, they are platinum
The strong magnet was likely just preventing the read head from properly moving across the platters surface and didn't effect the polarity of stored data. Now a powerful electromagnet on the other hand could invert some bits of data.
Guy: *puts magnet on hard drive*
Guy: nothing, still working!
Drive: *0 disk usage*
Lol
Also drive: 100% disk usage
has 750gb hdd as daily driver
*sees 1tb hdd getting destroyed*
😧😨
Common dude they are cheap
Dude, the WD Blue used is around $50
@@bottomtext5872, 50$ are much for some persons.
@joshua broughton-herrick yeah you already edited it because you can't speak English either but you spelt peasant wrong.
joshua broughton-herrick in third world countries, 50$ is a lot of fucking money
The only thing i am concerned about is the minecrsft version... You sure it didnt work?
Lol.
The Minecraft game is loaded into memory on startup, so disk data does not matter after that unless you load a world.
3:25 hahah, that's how my pc works
I've often wondered about this since I have memories of accidentally ruining a reel-to-reel tape years ago. Thanks!
all the magnetic field is for is controlling the read/write apparatus. it works much like a speaker's voice coil.
all you are doing is interfering. also the enclosure is shielded, that's why no effect until you bring a really strong magnet.
There's a video of a guy with a really strong magnet. That's pretty cool
You'd need a 100-200lb magnet, that would bring the platter to the head and scratch it, too
This is crazy, I put a horseshoe magnet on a hard disk back around 2005 (it was already an old drive then probably from around 1998) and it erased it completely. There was nothing left of any file on there. They managed to proof a harddrive against that 🤔
HDDs work via magnetic coating on a ceramic or glass disk, you would need around 140 pounds of force to magnetically erase one.
SSDs work via chips that hold electrical charge, a magnet isn't going to do anything unless you're using it to smash the drive, the best way to kill an SSD would be to remove the charge or overload it.
Okay, that was unexpected. When I was in the Military, we used to destroy drives with a box that you put the drive in and then it zapped them with an EMP. That was military grade.
I know, I should do another video and try and EMP. While the computer is running
Sounds interesting!😉
No, you microwaved them. Totally different man.
no it was not an EMP or microwave...
it is a degausser.
@@freedustin You might speak a different version of English, but Microwaves are a form of Electromagnetic radiation. The machine we used was definitely an EMP generator. Took about 10 seconds per drive. You could fry just about any magnetic media with it. Floppies, VHS Tapes, cassettes, etc. What is your definition of a Degausser? Does it generate an magnetic field with electromagnets for a short period of time? One might say a 'pulse' of the electromagnetic type? An EMP? Either way, you're wrong. Fuck off.
My guess is that the magnet merely held the read/write head in place, preventing it from moving, without changing any of the data. The computer acted wonky because the hard drive suddenly disappeared.
magnet.exe can take 100% disk now try it on a ram
Ram is non magnetic it wont work
@@shadowxxe do you know what is .exe?
or you just simply want to ruin the joke?
@@bislo1191 .exe is an executable program used by windows to execute an operation and yes i did want to ruin the joke
@@shadowxxe please don't, appreciate creativity 👍
@@bislo1191I appreciate creativity its just this isn't the most creative of jokes
6:24 the reason for the disks slowing down is because the magnet induces currents inside the disks (only possible when spinning) and those currents create opposing magnetic fields slowing down the disks. if it were the actuator arm getting attracted to the disks it would have destroyed itself in a second (head crash)
Very instructive, I know you always had to be very careful with floppy disks in the old days but I've never heard of a hard drive being damaged by an external magnet - what probably happened with your neodymium block magnet is that it disrupted the mechanical movement either of the platters or the head temporarily, creating the symptoms you saw, but did nothing to the magnetic data on the disk.
The reason is because modern hdds have a feature where if the drive is shaken, or comes in contact with a magnetic field, the drive will stop reading and writing, and Windows will set up a queue of processes when the drive is ready to read again. That is why all of the programs opened when he pulled the magnet away.
the movie you watched was called "the core" :-D
Oh yeah..."the core" I couldn't remember for the life of me, Thanks!
Me: *Laughs in SSD*
Say hello to Killer USB 2.0
ok
fr
@@destiny_02 killer usb without the killers. I want this to happen.
Great idea! Thought of doing this many times! Well done! Though, I think the game is mostly running in memory, thus a disk issue is not directly observed. Unless is was swapping or loading stuff as you walk though the story line (loading new stuff from the disk)
Totally enjoy your video and the content of them. Great job as always.
4:24
The most beautiful thing ever
Agreed
Jake Playz
XD
It's really cool that you took the time to try some of this, but really what you're demonstrating is interfering with how the disks operate; i.e- you stopped the drive from being able to physically spin and read/write normally, which is why the PC locked up then resumed again, rather than showing any kind of corruption.
If you want to show corruption then the easiest way would be to fill the disk with large files, and generate checksums for these. After attempting to corrupt the disk, you can then generate the checksums again to see if they changed, which would indicate corruption. Admittedly not as amusing to watch though 😉
Excellent! Makes one wonder why the disk slowed down with the magnet near. Very interesting Matt!
I just subscribed.
I always wondered about the same thing if a magnet would affect it but I never would ever attempt to do what she did.
Awesome video buddy.
Keith
I placed a magnet on my laptop and it stopped working RIP
Same. Killed a 2010 MacBook Pro with a neodymium magnet. Much smaller that the one in this video. The computer refused to reboot and the hard drive made a clicking sound afterwards.
Fucking magnets! How do they work!?
@@NCXitlali Magents don't work! they don't have a degree. unlike Thermometers that have many and are overqualified!
@@thesole_randomguy fucking magnets! How do they work!? 🤣
Me too, it's gone now😂😂😂😂
Yeah I saw this coming, thankfully modern HDDs are pretty durable cause I once set a 100lb strength rare-earth magnet right on top of my laptop's HDD without thinking and it locked to the metal laptop surface and I heard the drive making a very distressed sound, but after I quickly pulled it off everything was fine and I got another year out of the drive before it started acting up (which may have just been age).
Wow, that must have been scary for sure, especially if you had important stuff on the laptop.
@@WarpedPerception It was terrifying! I saw my digital life flash before my eyes that day lol
Great video man, really wondered how it was bad, now I know. Thanks man.
The base of the arm on the regular hard drive has a magnet close to the strength of your 40lb. magnet under the silver part but its tiny.
The movie he is referring to is called "The Core".
ruclips.net/video/2ePBNGmxVK8/видео.html
What if we use electro magnet. In one of the episode in 'Breaking bad' they destroy the evidence using strong electro magnetic. Is that possible?
It does erase the data if it’s big enough and close enough, a few people have tested it, including mythbusters
8:56 Do you see that half circle mechanism directly behind the read/write arm? There’s actually 2 of them (top and bottom) and they each contain an AWESOME rare earth magnet which powers the arm’s movement as well as provides magnetic force for the actual reading and writing to the platter(s). I’ve taken *A TON* of of them apart to salvage these incredible magnets out of them (my wife’s company regularly has to destroy many of them as they outdate and contain sensitive info....I keep a STACK of these magnets for fun and projects. Your powerful magnet is disrupting the control of the arm and read/write head at it’s other end by disrupting the magnetic field which “tells” the HDD controller WHERE the arm is....effectively blinding the controller. No disruption of data occurred.....or the computer would no longer boot or function correctly (known as corrupted sectors on the drive).
The reason why it did stop working until you removed the magnet is because when the platter is stopped, the head does normally touch it, so to avoid damage, if the speed of the platter is under the nominal speed of the disk, the head gets parked for safety. The only thing that makes it float is the air moved by the platter itself, which is the reason there isn't vaccum drives yet, but instead of that helium sealed drives do exist to increase the data density by stabilizing the air currents inside and making a tighter fit between heads and platters.
"disk begging for help at 100% usage"
*opens Google Chrome*
do you wanna blow up a city or what? you can't be doing that
By the way, when the magnet is there in your HDD. that’s how usually my PC responds with no magnet...
This is definitely good to know, now i don’t have to worry too much about magnet close to my pc, also since a pc and the harddisd drince itself are both shielded with a metal case for protection😁
Interesting experiment, thanks
Your more likely to break your drive by the impacts you were doing to it. You have to be careful with shocking it to make sure the test is not tainted. I know this because I've been working on them changing out heads to recover data from them.
I am pretty sure that in the movie you watched the hacker used an electromagnet which has a job of wiping disks and ruining tech.
Yes, it may have been an electromagnet
When the HDD detects any kind of shock, it parks the read / write head until it detects that it's still again... It takes a few seconds until it read data again.
And putting a magnet direct to the header will damage the platters or just keep rolling like nothing?
ah its refreshing to see someone that doesnt try to dramatise everything and fill the video up with unnecessary junk. but rather just do what they set out to do and accept whatever outcome there is. you have my respect and a new sub.
All you have seen was in RAM, the magnet only damage the mechanism of the HDD.
Wut r u stoopid
@@shimonUD sorry?
@@rigby.other2w sorry
There's one more magnet you should try. It's called a bulk eraser, and we use them in commercial radio and television to erase an entire cart, or open reel. I think it sends an alternating polarity through the media. Should work on an HDD. Pretty sure any magnet placed directly under a CPU will disrupt it's operation, too. Caught a wild tech doing that to one of my client's PC when I was in the service field, back in the 90s.
When doing the tests I would try not to jar the HDD because that can also have an effect, so it's best to eliminate other possibilities of failure
I think eddy currents may have slowed down the disk, they don't have a very strong motor anyways
yeah- i'd say the magnet may not affect the data but certainly messed with the motor as seen when it slowed down while open. Electric motors are based on magnetism.
Now I want to play Minecraft
Modern hard drives have a protection system where if strong magnetic fields are detected it will shut down the hard disk to prevent further damage. That's why it did not work when the magnet was on the hard drive. When the magnet went away, it automatically resumed what it had to do and it opened all the programs.
8:56 On the base of the arm there is a pretty strong magnet so it is natural that a magnet would not easily mess the data,
8:13 ssd*
@joshua broughton-herrick 🤣
@joshua broughton-herrick Its, not a disk idiot it has no moving parts
@joshua broughton-herrick NO its classed as a drive not a disk drive thats why its called solid state DRIVE and not solid state DISK
*FBI wants to know your location*
The reason why when you put a magnet near the disk it slows down is because there's also magnets inside the motor, and coils. it's repelling/attracting from the motor magnets which makes it harder to turn.
Well with a spinning disk, it uses a "moving coil" to move the disk heads. I'm guessing here, that your "super strong magnet" was stronger than the moving coil, all 12v of it, so the heads couldn't move, but interesting none the less!
Minecraft helped the Hdd live.
A 100 pound per square inch would destroy the hardware
I'm thinking the magnet made the motor less efficient which slowed it way down. I'd be curious to see what happens if you stick the magnet over the actuator since it uses magnetic fields to move. But the only way this would wipe anything is if you dropped the magnet on the open hdd and damaged the platter.
I had worn my starfleet communicator pin while playing on my 486 with windows 3.1 and dos 6.22. It messed it up big-time. Had to reformat and it never did work quite the same again. Glad they have improved things over the years.
Starfleet communicator pin ?.
@@WarpedPerception Yes. I bought one at a show a long time ago. It has a powerful magnet so you can attach it to your shirt.
Byte 6d65 no it was just the fysical shock from the magnet hitting the hdd. A hit with a stone would have had that same effect. The readhead on the arm skips some tracks and the hdd has to find his track and required speed for it again and thats all of the delay, all thats seen here.
And indeed, there is a supetstrong neodyniummagnet half an inch beside the platter inside the cover. That cover that diverts the strong enough fieldlines to destroy data easally around the platter.
I agree - he should have turned off the computer so that the HDD heads would be off the platter or in a landing zone on the platter, then applied the magnet. Of course, the final result would be the same.
Well I did try the magnet on the platters themselves more toward the end of the video, I'm going to hook that hard drive up again and see if the data is okay. I'm pretty sure even the steel cover on the hard drive provides some sort of magnetic shielding.
@@WarpedPerception Yes, you are right about the shielding. I'm sure it is intentional on the drive manufacturer's part.
4:10 "Try To Open Up Bowser"😮😮
Sticks magnet on the hard drive
*bush in minecraft spontaneously combusts*
I know someone who worked for the IRS and they used electromagnets to damage harddrives. They used electromagnetic wands that plugged into regular outlets that didn't totally erase the drives but corrupted the data to the point the disk couldn't be used again. He was told they used to have special rooms with electromagnets even more powerful to try and erase the data. Don't know if it's true. It's what he told me.
this is why SSDs are better
After making this little video I was thinking about doing as episode on hard drive vs. SSD. Ssds are the bust
@@WarpedPerception yeah basically
but SSDs can have quicker data rot because they need an internal battery to keep your data when the drive is off, because SSDs use electrical charge to store data. This also means that if yhe internal battery dies then you basically can’t shut off the computer because the data will be lost extremely quickly. So for now I’m on team HDD.
That’s for DRAM-SSDs btw
yea dude I hate when my 40 pound magnet attaches itself to my hard drive and crashes my pc, wish I had an SSD then I wouldn’t have this issue
The fact that it's still working is very unexpected
I really got to give you props for putting the things to practice rather than doing a whole investigation to theorize what might happen and then put it to practice. Which could get a lot of backlash from the elitists who already knew that or found out what would happen by doing some simple research beforehand and feel the need to point out that the result was obvious and also props to those who know about them and respectfully explain the reasons to share the knowledge.
I guess the simplicity of doing to know what will happen appeals me more than knowing what'll happen and put to practice.
Funny that you say that, a lot of things that I do sometimes I start researching them, just out of curiosity, I spend a lot of time researching and sometimes I think to myself, "can't we just do it and see what happens" I'm not even going to pretend like I thought nothing was going to happen oh, I thought the drive would be toast, so did every computer guy I talked to. Now I reached back out to those people and told them what happened, sent them the video, they are totally confused... These are IT guys I'm talking about.lol
Thank you
@@WarpedPerception Lol, that sounds really cool, funny how you taught your friends something new too!
And thanks to you for the content as well man, keep up the good work man :D
i know this is an old video but i think the reason it slows down with the magnet near it is probably because eddie currents are induced in the platter which in turn creates a magnetic field and opposes the spinning movement, similar to what happens with dropping a magnet down a (non magnetic) metallic pipe
The magnets hitting the HDD at that speed will do more mechanical damage than the magnetic field itself. With the strong magnets, the platters slow down and the speed of the HDDs is determined by how fast they spin so that's why Windows hanged. The head (arm you referred to) also probably got stuck because of the magnet but I'm not sure whether its made out of magnetic metals so I can't say for sure.
A magnet physically blocks the transmissions of data in a computer, and youd need a pretty strong one to rip through a hard drive. Thats why you saw the computer start working again after you took it off, and while its definitely not a good idea it (probably) wont destroy the data burned into the hard drive (probably). The second air leaks in its dead tho. Remember that scene from indiana jones where the guy crumbled when exposed to air? Think of it like that
4:00 You just killed the disk by impact not from the magnetic field. The metal in which the disk is encased is a type of metal that reflects magnetic fields, nothing magnetic can get through it (I don't remember the name of the metal now).
But if you hit the disk while it's operating, 1G could easly misalign the heads and you will have that behaviour. The previous hit also made some damage and thats why you saw a little increment in disk usage.
On the other hand, the disk usage meter doesn't measure usage, just amount of pending read/write operations. When you hit it the previous time it probably lost some RPMs and resetted the heads position and maybe some damage went into the disk itself so R/W was slower. Last hit could make the heads hit he disk, slowing it down or scratch the plates hardly. Some disks, when the RPMs drop just stop for protection.
I hope you didn't make the recovery into the same disk xD
6:20 The stopping happens because eddy currents are generated on the moving metal that oppose the magnetic field. That's what some exercese bikes use to slow the pedals. No friction brakes. Same principle behind magnetic brakes.
This is what I was interested in finding out. Someone pointed out that a transfer of data would've been more effective for a demonstration and that's true but ... the fact is Minecraft was installed on the HDD as everything else I imagine and there was no data loss, which is the part I was interested to discover.
I'm not sure if a powerful enough magnet would corrupt or erase data beyond recovery, I think that if the magnet is capable of flipping the data blocks and remagnetize them, everything will be gone forever. Although it is encouraging that it would take a powerful magnet and even then, all that caused was the platters to slow down and it resumed functioning after that, with all the data still intact. I have a few drives that were manufactured 10+ years ago, so I don't know how differently they would handle this same test. Good to know that newer HDDs are, among other things, more resilient to magnetism.
Nice test!
Nice video. If you had placed a magnet near an older "Floppy" disk or a Zip Drive that both use a Magnetic disc for storage then yes a magnet would wipe them out - like what was suppose to happen in the Movie.
The reason is because modern hdds have a feature where if the drive is shaken, or comes in contact with a magnetic field, the drive will stop reading and writing, and Windows will set up a queue of processes when the drive is ready to read again. That is why all of the programs opened when he pulled the magnet away.
great work I was still thinking that magnet will destroy HDD
First-time watcher here.
There is something about this guy - it just feels like he's gonna say "Fuh-get about it."
The strong magnet interfered with the spinning disk's motor's magnetic field. In order for the DC motor to work, it needs power in the windings that'll produce a magnetic field. But if you put a strong magnet near the center of the disk which is where the motor is located, your magnet's magnetic field will start cancelling the motor's magnetic field which if the motor's magnetic field and the magnet's magnetic field cancel each other to zero, the disk stops spinning completely. For more info just search for " how a DC motor works". As for the actuator, the reason why it stopped working is because it only starts reading the Plata after the disk reaches its maximum revolutions per minute (RPM) which can be either 5400rpm or 7200rpm depending on the manufacturer's design, otherwise the actuator arm will retract to its resting position which in this case the center of the Plata. Newer hard drives' actuator arms rest on a compartment outside the plata. At full speed, the Plata creates like an air barrier or cushion that prevents the actuator arm from scratching the Plata when it's accessing data on the Plata which when it does scratches the Plata will result in bad sectors or inaccessible data or permanently damaging the Plata or the hard drive's storage area.
What happened when you put the strongest magnet to the harddrive is the harddrive had a safety feature where if it feels a certain amount of gforce or movement, it'll completely stop reading and writing like you saw when you took the cover off and when you release it, it'll resume whatever you had in queue which is why a bunch of the applications you clicked opened up. With an SSD, it won't affect it at all because it's all electronic and not mechanical.
At least these magnets have the same power as fridge magnets and clothes magnets
Im surprised that the pc is still running and the powersupply is not dead. when looking at it 2 of the GPU's are connected with molex to pcie connectors. They are also somehow running considering that only the six pin is plugged in for the reference cards. im in disbelieve that it even works. You should probably get a better Powersupply or get rid of some cards since the mining craze is basically dead.
You should use a fishing magnet with 1000 lb magnetic force.
Wow, I was thinking that you were just slowing the disk because of overall magnetic metal (even if the platters are metal-coated glass). But if that's from the individual bit domains then that would be pretty amazing! However, then I'd have the question of how the data doesn't blend with itself if its that strong!
I've read that on current hard disk drives the magnetic domains are too small to be disrupted, however all of the domains and combination create an overall magnetism of the disc. That's what I read
@@WarpedPerception: That is interesting, isn't it? But since a some drives we might have are old enough that the domains aren't as small, and we can't be too sure if a fluke will happen, it's better to be safe than sorry. But yeah, it was still an interesting experiment. Also, opening the HDD's case and letting the dust in can damage it just that way.
The Movie was "The core". That HDD's are from 2003 and he used handsized electro magnets (and a microwave for the CDs).
A weak magnet on a bracelet killed one of my driver's in a laptop. The movement of the magnet over the head mechanism eventually caused it to fail mechanically. It's not the data that's at risk exactly, I recovered all my data slowly, but the mechanical function of the drive.
It killed one of your driver's _what_ things in a laptop computer?
what happened if you rotate the magnet and try the other side of magnet(opposite pole)????
is it possible that the hard disk Faster to rotate ???
What if you just stopped the disk from spinning with a heavy object or something?
The reason why all those applications suddenly opened up was because you clicked the shortcuts to open the apps while the magnet was attached to the hdd, so they only opened why the magnet was taken off
Cool test. Though i have some comments:
1: Minecraft isn't ideal to test hard drive function. It will crash if you destroy data, but not instantly. Since the actually used data will be in RAM, destroying data on the hard drive will only cause problems randomly delayed.
2: The moment the system crashed may be caused by the impact and therefore fast movement of the drive. Especially since it ran normally again after a restart. But data may still have been damaged, that's impossible to know without scanning it all.
3: The magnet slowing down the platter spinning is very interesting! I would guess this happens because of the strong magnetic field disrupting the ones inside the electromotor driving the platters. Very cool footage i have never seen before!
Interesting video 👍
The harddrive Sensor thingy creates a small magnetic field and if the data is needed it goes back to the magnetic field and read it and starts the Program but if a second magnetic field is created instead of the harddrive senior thingy it doesn’t know what data to extract and breaks
I'm trying to fix my laptop hard drive but first I got to get my files back then I have to get it fixed which to open my laptop and its has no way to open it without the key board please help