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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
I had a surprising experience recently. I took a couple of hard drives
and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i |
#2
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
"Ignoramus17253" wrote in message ... I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i My God, you have WAY too much time on your hands! |
#3
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Ignoramus17253 wrote:
I am rather amazed as to how tough the hard drives are. I'm not that much amazed how weak your are. Nick -- The lowcost-DRO: http://www.yadro.de |
#4
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Ignoramus17253 wrote:
I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i High velocity data destruction works much better. 7 Rem. Mag. at 100 yds. will punch straight through all platters and cause enough shock to shatter the cast aluminum frame. .22 LR will stop by the second platter BTW. |
#5
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
In article ,
Ignoramus17253 wrote: I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil Waste of a couple of large rare-earth magnets (per drive) you could get by disassembling (sometimes only 1, sometimes a few tiny ones as well). Not to mention nice aluminum for casting, when you strip off the other crap, and some reasonable bearings. Sledgehammer - how...subtle. -- Cats, coffee, chocolate...vices to live by |
#6
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Applying sledgehammer to computer hard drives
My God, you have WAY too much time on your hands!
Iggy needs to start an apple orchard or a brush company. Karl |
#7
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
"Ecnerwal" wrote in message ... In article , Ignoramus17253 wrote: I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil Waste of a couple of large rare-earth magnets (per drive) you could get by disassembling (sometimes only 1, sometimes a few tiny ones as well). Not to mention nice aluminum for casting, when you strip off the other crap, and some reasonable bearings. Sledgehammer - how...subtle. -- Cats, coffee, chocolate...vices to live by I needed a few of the magnets. Drill out pins, screw, ..... Used a large 5lb hammer. Hit on the sides, pull the cover off... get your powerful magnets... xman |
#8
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Applying sledgehammer to computer hard drives
Regarding a comment that I have too much time on my hands -- the hope
was to SAVE time by just hitting the drive with a sledgehammer. i |
#9
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
The magnets inside the drive have to be the coolest things on the planet!
They are a pain to deal with but once you get them out they are very useful to have around if anyone has never pulled one apart I'd recommend it just for the parts. At the bank I worked for we had a drill press that we sent all the drives to that were being sunset. While I agree shooting them would be way more fun we needed to document the destruction of the platters and a 3/8" hole did the trick. (Then we scammed the magnets!) |
#10
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
On 2007-10-08, RDF wrote:
The magnets inside the drive have to be the coolest things on the planet! They are a pain to deal with but once you get them out they are very useful to have around if anyone has never pulled one apart I'd recommend it just for the parts. You can buy them by the hundred on eBay, for not too much, in my more useful shapes. I have a lot of rare earth magnets and they are very useful, but extracting them from hard drives is not cost effective (I tried). i |
#11
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
"RDF" wrote in message . .. The magnets inside the drive have to be the coolest things on the planet! They are a pain to deal with but once you get them out they are very useful to have around if anyone has never pulled one apart I'd recommend it just for the parts. At the bank I worked for we had a drill press that we sent all the drives to that were being sunset. While I agree shooting them would be way more fun we needed to document the destruction of the platters and a 3/8" hole did the trick. (Then we scammed the magnets!) this is something i've been wondering about, i mean, not a LOT but was wondering. the thread about a way to slow down a windmill using magnets and a non-ferrous disc creating eddy effects... wouldn't a computer hard drive do the same thing? fast spinning non-ferrous disc spinning rapidly near a rare earth magnet? wouldn't you need at a certain point like a 3/4 hp motor to spin the disc in a hard drive? |
#12
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Not surprising,
If you take one apart before you sledge it, you'll see the base plate is a sollid chunk of casting, they have to be to maintain the close tolerances. The main spindle that the platters are on is in the center of the device so if you smacked it in the center your sledge was pretty much striking a sollid round piece of metal that got pushed directly on to the anvil, ya might as well have his a 2 inch round aluminum. Best way to get maximun destruction in one blow would be to grab it in a vise about a 1/3 of the way up, below what would be the spindle and the hole it goes through, then smack the **** out of it, you'll have a better chance of cracking the base plate casting where the spindle goes through. --.- Dave "Ignoramus17253" wrote in message ... I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i |
#13
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
On Mon, 8 Oct 2007 10:46:50 -0400, "Tom Gardner"
wrote: "Ignoramus17253" wrote in message m... I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i My God, you have WAY too much time on your hands! Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner |
#14
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Gunner Asch wrote:
On Mon, 8 Oct 2007 10:46:50 -0400, "Tom Gardner" wrote: "Ignoramus17253" wrote in message m... I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i My God, you have WAY too much time on your hands! Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner Of course, everyone should have a copy of that as well as the military explosives tech manual... I expect we'll be needing them in the next few years... |
#15
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Applying sledgehammer to computer hard drives
"Pete C." wrote in
: snip Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner Of course, everyone should have a copy of that as well as the military explosives tech manual... I expect we'll be needing them in the next few years... I've got a couple of them floating around and always wondered how acurate they really are. (Puts tinfoil hat on) I've heard rummers that alot out there are intentially buggered up just enough to screw up (read 'screw up' as cause major body parts to move in oposite directions) to whoever might actually try to use the recipes or procedures. (Takes off tinfoil hat) I do wish I could get my hands on info I could reasonably trust. Bill |
#16
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Try a highschool chemistry book,
This ain't rocket science.. --.- Dave "Bill" wrote in message . 97.142... "Pete C." wrote in : snip Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner Of course, everyone should have a copy of that as well as the military explosives tech manual... I expect we'll be needing them in the next few years... I've got a couple of them floating around and always wondered how acurate they really are. (Puts tinfoil hat on) I've heard rummers that alot out there are intentially buggered up just enough to screw up (read 'screw up' as cause major body parts to move in oposite directions) to whoever might actually try to use the recipes or procedures. (Takes off tinfoil hat) I do wish I could get my hands on info I could reasonably trust. Bill |
#17
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Geez Gunner,
I figured you'd have offered to give him a few rounds 357 :-) --.- Dave Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner |
#18
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
It's pretty easy to just take the hard drive apart with hand tools, no
sledgehammer required. -- Jedd Haas - Artist - New Orleans, LA http://www.gallerytungsten.com http://www.epsno.com |
#19
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
In article ,
"xmradio" wrote: I needed a few of the magnets. Drill out pins, screw, .... Used a large 5lb hammer. Hit on the sides, pull the cover off... get your powerful magnets... All it takes is some tiny Torx (usually), a Phillips (often) and less than 3 minutes. No drilling or hammer required. Bet it takes me less time to take one apart than Iggy spent hammering. Helps to remember that every "do not remove" label is concealing another screw. Torx sizes under T10 are easy from McMaster or MSC, nearly impossible at the average hardware store. Shipping will kill you if that's all you order, but if you're placing an order anyway, a set from T5 to T9 comes in handy. In article , "William Wixon" wrote: this is something i've been wondering about, i mean, not a LOT but was wondering. the thread about a way to slow down a windmill using magnets and a non-ferrous disc creating eddy effects... wouldn't a computer hard drive do the same thing? fast spinning non-ferrous disc spinning rapidly near a rare earth magnet? wouldn't you need at a certain point like a 3/4 hp motor to spin the disc in a hard drive? No. The magnets are off to one side of the disc, driving the head. They are in pole pieces that make for a very powerful field between the magnets (there's a coil on the head mechanism back-end that sits in-between there), but which also help to contain the field there. If you had them in a position to cause eddy currents, you'd destroy the magnetic data on the drive surface. Note - some very old drives don't have such nice magnets - they have a stepper motor, but that's usually obvious from the outside of the drive. -- Cats, coffee, chocolate...vices to live by |
#20
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Ignoramus17253 wrote:
I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i When I needed to kill a data drive from where I used to work, a minute or two with the o/a torch did the job for me. Wes |
#21
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Applying sledgehammer to computer hard drives
"Dave August" wrote:
I figured you'd have offered to give him a few rounds 357 :-) Likely a felony without an Illinois FOID card. Wes |
#22
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Bill wrote:
"Pete C." wrote in : snip Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner Of course, everyone should have a copy of that as well as the military explosives tech manual... I expect we'll be needing them in the next few years... I've got a couple of them floating around and always wondered how acurate they really are. (Puts tinfoil hat on) I've heard rummers that alot out there are intentially buggered up just enough to screw up (read 'screw up' as cause major body parts to move in oposite directions) to whoever might actually try to use the recipes or procedures. (Takes off tinfoil hat) I do wish I could get my hands on info I could reasonably trust. Bill I think the ones that are actual US govt./ military publications should be sufficiently trustworthy. |
#23
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Pete C. wrote:
Bill wrote: "Pete C." wrote in : snip Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner Of course, everyone should have a copy of that as well as the military explosives tech manual... I expect we'll be needing them in the next few years... I've got a couple of them floating around and always wondered how acurate they really are. (Puts tinfoil hat on) I've heard rummers that alot out there are intentially buggered up just enough to screw up (read 'screw up' as cause major body parts to move in oposite directions) to whoever might actually try to use the recipes or procedures. (Takes off tinfoil hat) I do wish I could get my hands on info I could reasonably trust. Bill I think the ones that are actual US govt./ military publications should be sufficiently trustworthy. Most of the military manuals, especially the improvised anything ones, are only trustworthy if accompanied by the training that would have gone with them when they were issued to those that needed them. As stand alone knowledge bases, the ones I have seen, left a bunch to be desired, and were written on the premise that the reader already knew many important things. They also presume access to supplies that would not be readilly available, outside a combat zone (eg, mortar shells, from which, anti personell mines could be improvised) The basics of this stuff is easy, it's the million little details that'll get the experimentally minded reader killed. Even the better written books, that I have seen, expected that a base of knowledge was available, and that the reader was not ignorant of the basic safety precautions. Cheers Trevor Jones |
#24
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
On Mon, 8 Oct 2007 11:04:30 -0500, with neither quill nor qualm, "Karl
Townsend" quickly quoth: My God, you have WAY too much time on your hands! Iggy needs to start an apple orchard or a brush company. Better yet, an apple brushing company! -- Ultimately, the only power to which man should aspire is that which he exercises over himself. -- Elie Wiesel |
#25
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Applying sledgehammer to computer hard drives
On Mon, 08 Oct 2007 10:02:19 -0700, with neither quill nor qualm,
Gunner Asch quickly quoth: On Mon, 8 Oct 2007 10:46:50 -0400, "Tom Gardner" wrote: "Ignoramus17253" wrote in message Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. --snip-- My God, you have WAY too much time on your hands! Hummmm...I wonder if I should send him an e-book on improvised explosives....... Yes, just make sure it's the one on IEDs, not IUDs, OK? Hell, upload it to the dropbox, too. I'm sure it would interest many of us. -- Ultimately, the only power to which man should aspire is that which he exercises over himself. -- Elie Wiesel |
#26
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
"RDF" writes:
The magnets inside the drive have to be the coolest things on the planet! They are a pain to deal with but once you get them out they are very useful to have around if anyone has never pulled one apart I'd recommend it just for the parts. At the bank I worked for we had a drill press that we sent all the drives to that were being sunset. While I agree shooting them would be way more fun we needed to document the destruction of the platters and a 3/8" hole did the trick. (Then we scammed the magnets!) A single 3/8" hole would make the drive unuseable, but the data would still be recoverable (except right in the hole, of course). |
#27
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
"Ignoramus17253" wrote in message
... I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i ISTR the NSA figures that if a disc is in something like 43 or more pieces, the data is statistically irrecoverable. A nail or rod driven through the case at the right place seems to do the job. A hammer isn't necessarily going to break all the discs, especially if just one breaks and the others bounce around, padded by the head and other bits of glass. |
#28
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Applying sledgehammer to computer hard drives
Ignoramus17253 wrote:
I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. There's two problems here. - there's no anvil, not that you need one to smash a hard disk. - you have a weak wrist or can't handle a sledgehammer. |
#29
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Applying sledgehammer to computer hard drives
Ignoramus17253 wrote:
On 2007-10-08, RDF wrote: The magnets inside the drive have to be the coolest things on the planet! They are a pain to deal with but once you get them out they are very useful to have around if anyone has never pulled one apart I'd recommend it just for the parts. You can buy them by the hundred on eBay, for not too much, in my more useful shapes. I have a lot of rare earth magnets and they are very useful, but extracting them from hard drives is not cost effective (I tried). You trying isn't saying much. You can't handle a hammer- there's not much you could do with a torx driver. |
#30
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Applying sledgehammer to computer hard drives
On Mon, 08 Oct 2007 08:59:03 -0500, Ignoramus17253 wrote:
I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil I know I've said it before, but it's funny that, just seeing a subject line, I can tell when you wrote it. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. Great source of little parts. Your budding engineer of a son would probably find a great deal of pleasure from dissecting them. |
#31
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Applying sledgehammer to computer hard drives
On Mon, 08 Oct 2007 09:57:28 -0500, Pete C. wrote:
High velocity data destruction works much better. 7 Rem. Mag. at 100 yds. will punch straight through all platters and cause enough shock to shatter the cast aluminum frame. .22 LR will stop by the second platter BTW. Anything interesting happen if they're spinning at the time? |
#32
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Applying sledgehammer to computer hard drives
On Mon, 8 Oct 2007 10:52:32 -0700, "Dave August"
wrote: Geez Gunner, I figured you'd have offered to give him a few rounds 357 :-) --.- Dave Im sure he already has those. Gunner Hummmm...I wonder if I should send him an e-book on improvised explosives....... Gunner |
#33
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
Dave Hinz wrote:
On Mon, 08 Oct 2007 09:57:28 -0500, Pete C. wrote: High velocity data destruction works much better. 7 Rem. Mag. at 100 yds. will punch straight through all platters and cause enough shock to shatter the cast aluminum frame. .22 LR will stop by the second platter BTW. Anything interesting happen if they're spinning at the time? I never tried dragging a battery out to power them up, however I suspect even a 15K RPM drive wouldn't do anything real interesting spinning vs. non spinning when hit with a 3,000 FPS+ projectile. |
#34
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Applying sledgehammer to computer hard drives
On 2007-10-08, Carl McIver wrote:
"Ignoramus17253" wrote in message ... I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil http://igor.chudov.com/projects/Weld...de-Mini-Anvil/ Then I hit it with a sledgehammer, expecting part to fly away and to see the hard drive utterly demolished. But no such thing occurred. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. i ISTR the NSA figures that if a disc is in something like 43 or more pieces, the data is statistically irrecoverable. A nail or rod driven through the case at the right place seems to do the job. A hammer isn't necessarily going to break all the discs, especially if just one breaks and the others bounce around, padded by the head and other bits of glass. That was a MS windows hard drive, the only useful data was SSH keys. On my linux box, I keep my secrets in a secure manner. i |
#35
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Applying sledgehammer to computer hard drives
On 2007-10-08, Dave Hinz wrote:
On Mon, 08 Oct 2007 08:59:03 -0500, Ignoramus17253 wrote: I had a surprising experience recently. I took a couple of hard drives and tried to destroy them with a 8 lb sledgehammer. I put a hard drive on an anvil I know I've said it before, but it's funny that, just seeing a subject line, I can tell when you wrote it. Barely any damage was visible on the drive (though, probably, it would no longer function). After many more hits, finally, the hard drive was shoring visible deformation of its frame. I am rather amazed as to how tough the hard drives are. Great source of little parts. Your budding engineer of a son would probably find a great deal of pleasure from dissecting them. We actually dissected one before, he liked it and we indeed took the magnets out (and shiny platters). They are a little stronger than eBay magnets, but not my as much as to justify their weird shape, for actual use. i |
#36
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Applying sledgehammer to computer hard drives
On 2007-10-09, Pete C. wrote:
Dave Hinz wrote: On Mon, 08 Oct 2007 09:57:28 -0500, Pete C. wrote: High velocity data destruction works much better. 7 Rem. Mag. at 100 yds. will punch straight through all platters and cause enough shock to shatter the cast aluminum frame. .22 LR will stop by the second platter BTW. Anything interesting happen if they're spinning at the time? I never tried dragging a battery out to power them up, however I suspect even a 15K RPM drive wouldn't do anything real interesting spinning vs. non spinning when hit with a 3,000 FPS+ projectile. Would be fun to try spinning them without the cover. (using full face mask) i |
#37
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Applying sledgehammer to computer hard drives
Ignoramus17253 wrote:
On 2007-10-09, Pete C. wrote: Dave Hinz wrote: On Mon, 08 Oct 2007 09:57:28 -0500, Pete C. wrote: High velocity data destruction works much better. 7 Rem. Mag. at 100 yds. will punch straight through all platters and cause enough shock to shatter the cast aluminum frame. .22 LR will stop by the second platter BTW. Anything interesting happen if they're spinning at the time? I never tried dragging a battery out to power them up, however I suspect even a 15K RPM drive wouldn't do anything real interesting spinning vs. non spinning when hit with a 3,000 FPS+ projectile. Would be fun to try spinning them without the cover. (using full face mask) i Just mill up a nice lexan replacement cover and call it wall art... |
#38
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Applying sledgehammer to computer hard drives
According to William Wixon :
[ ... ] this is something i've been wondering about, i mean, not a LOT but was wondering. the thread about a way to slow down a windmill using magnets and a non-ferrous disc creating eddy effects... wouldn't a computer hard drive do the same thing? fast spinning non-ferrous disc spinning rapidly near a rare earth magnet? wouldn't you need at a certain point like a 3/4 hp motor to spin the disc in a hard drive? Nope! The magnets are in a set of pole pieces which confine the field well away from the disks, and the coils on the back of the head arms are in the only place where there is much field. Remember -- if the field got to the platters, it would happily erase the data on the platters, so there is very strong motivation to keep the magnets' fields confined where it can move the head arm stack and do nothing else. Once you get the magnets out, if you try to separate the pole pieces, be careful. You can get some nasty blood blisters if you start to pry them apart and they snap closed again on your fingers. :-) Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#39
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
According to Ignoramus17253 :
On 2007-10-08, Dave Hinz wrote: [ ... ] Great source of little parts. Your budding engineer of a son would probably find a great deal of pleasure from dissecting them. We actually dissected one before, he liked it and we indeed took the magnets out (and shiny platters). They are a little stronger than eBay magnets, but not my as much as to justify their weird shape, for actual use. If you want to separate the magnets from the pole pieces, heat it up with a torch to soften the Loctite (or similar) which glues the magnets to the pole pieces. Put the pole piece in a vise, apply sideways pressure with a screwdriver (or with some wood), and heat the pole piece from below. When the Loctite softens, you will feel the magnet slide sideways on the pole piece, and you can continue shoving until it is clear. (It will probably flip over and stick to the back side of the pole pieces.) Anyway, once you have it separate from the pole piece, you can affix it to pole pieces designed to serve *your* needs instead of those of the disk drive. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#40
Posted to rec.crafts.metalworking
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Applying sledgehammer to computer hard drives
"Larry Jaques" wrote in message ... On Mon, 8 Oct 2007 11:04:30 -0500, with neither quill nor qualm, "Karl Townsend" quickly quoth: My God, you have WAY too much time on your hands! Iggy needs to start an apple orchard or a brush company. Better yet, an apple brushing company! Larry, you're just...not right! |
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