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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
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Can a small industrial demagnetizer erase a hard drive
I have a little industrial demagnetizer from a grinding shop. Can this
thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks |
#2
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Can a small industrial demagnetizer erase a hard drive
"Ignoramus23924" wrote in message
... I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Reminds me of the ex girlfriend of one of my buddies back when Radio Shack had a real computer push. She was their computer guru. Usually she asked me or my buddy for help with anything as we were real computer nerds back then. One day she didn't ask us when she decided to erase an old Seagate MFM hard drive with a mag tape bulk eraser. When she powered it up you could hear that drive screaming 4 shops down the walkway in the mall. |
#3
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Can a small industrial demagnetizer erase a hard drive
On Wed, 25 May 2011 10:30:08 -0500, Ignoramus23924
wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Not nearly strong enough for succesful erasure. Severe mechanical destruction is the only safe way, A pickaxe stroke strong enough to both penetrate and mechanically distort the disk platter is a good start. CD / DVD destruction is much easier see http://flic.kr/p/9LRLva Jim |
#4
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Can a small industrial demagnetizer erase a hard drive
On 5/25/2011 10:30 AM, Ignoramus23924 wrote:
I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Take them outside, put them on a concrete sidewalk, give them 2-3 good hits with a sledgehammer. Drives made in the last ~10 years have tempered-glass platters that will shatter totally. Drives older than that have metal platters, but if they can't spin, they won't work. (Also if the controller circuit board gets smashed up, only the manufacturer probably has the ability to get or make a new one) Then you can just toss them in the trash -- but the frames of many are aluminum, if you recycle. ------- If you want to erase a working drive completely, just hook it up as a slave drive, get a random-over-writer like Eraser and do a 1X random over-write of the entire drive. Or go 3X if you want to get crazy, but nothing more is needed. It's not difficult, it doesn't take that long and you can have that going while still using the computer. http://eraser.heidi.ie/ Eraser is free and has a bunch of overwrite options, from 1 to 35 passes--but if you look at the list, you will see that many government and military standards are only a 3x random overwrite. ,,,,,, The way that most OS's restore previous versions of files is by an operating system feature, not by any technical aspect of the drives themselves. The OS does this by writing each new version at a different space on the drive. If you randomly-overwrite the whole drive even just once, ALL the versions will get corrupted. If even just the /previous/ drive write (in any single location) could possibly be recovered in any easy way with only the drive's own read/write hardware, then the drive would have 2X the capacity that it really does, and the hard drive companies would be capitalizing on that. And they're not. |
#5
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Can a small industrial demagnetizer erase a hard drive
Ignoramus23924 wrote:
I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. It shouldn't really matter. Is the data on them important enough to anybody for them to bother to go to the trouble to read it anyway? If they were mine, I'd take the bandsaw to them. Or crush them. But just opening the cover and scraping the disk with a screwdriver will do it. And to me, it'd be a heck of a lot more fun crushing them in the press than running a silly lil' ol' demagnetizer over them, which probably wouldn't have any effect anyway, since the steel covers will "short out" the magnetic field. Have Fun! Rich |
#6
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Can a small industrial demagnetizer erase a hard drive
DougC wrote:
On 5/25/2011 10:30 AM, Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Take them outside, put them on a concrete sidewalk, give them 2-3 good hits with a sledgehammer. If you do this, put some kind of backer plate under them so you don't chip or crack the concrete. Good Luck! Rich |
#7
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Can a small industrial demagnetizer erase a hard drive
On 2011-05-25, Bob La Londe wrote:
"Ignoramus23924" wrote in message ... I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Reminds me of the ex girlfriend of one of my buddies back when Radio Shack had a real computer push. She was their computer guru. Usually she asked me or my buddy for help with anything as we were real computer nerds back then. One day she didn't ask us when she decided to erase an old Seagate MFM hard drive with a mag tape bulk eraser. When she powered it up you could hear that drive screaming 4 shops down the walkway in the mall. Hard drives have very powerful magnets in them. i |
#8
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Can a small industrial demagnetizer erase a hard drive
Ignoramus23924 wrote:
I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks My brother uses a 1" neodymium magnet to find conduit and nails in walls. He is an electrician. One day he forgot the magnet was in his pocket and picked up his laptop that was running on batteries. He said that as the laptop came near his pocket he heard the windows shutdown song and his laptop never booted completely again. Using Spinrite to look at various cylinders on the disk, I determined he wiped a number of cylinders out in an instant. I suspect that if you power up the drive and use a similar sized magnet and do a slow wipe with the magnet on top and bottom of drive that disk will be dead forever. I hope you are not involved in anything that requires that level of paranoia. A hit with a hammer on the controller board would be enough to stop the curious at the landfill. I have a pile of drives I need to kill for good practice, I'm going to mine them for magnets. That might be a good job for your son. Give him some torx screwdrivers and tell him to take them apart and find the magnets. By the time he is done, that drive will be dead enough unless the FBI or CIA wants you for something. Wes -- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller |
#10
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Can a small industrial demagnetizer erase a hard drive
Is it a security issue ? - a few screws takes off the back and
then you just bend the platter(s). Easy. Martin On 5/25/2011 10:30 AM, Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks |
#11
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Can a small industrial demagnetizer erase a hard drive
On Wed, 25 May 2011 13:06:37 -0500, DougC
wrote: On 5/25/2011 10:30 AM, Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Take them outside, put them on a concrete sidewalk, give them 2-3 good hits with a sledgehammer. Drives made in the last ~10 years have tempered-glass platters that will shatter totally. Drives older than that have metal platters, but if they can't spin, they won't work. (Also if the controller circuit board gets smashed up, only the manufacturer probably has the ability to get or make a new one) Then you can just toss them in the trash -- but the frames of many are aluminum, if you recycle. ------- If you want to erase a working drive completely, just hook it up as a slave drive, get a random-over-writer like Eraser and do a 1X random over-write of the entire drive. Or go 3X if you want to get crazy, but nothing more is needed. It's not difficult, it doesn't take that long and you can have that going while still using the computer. http://eraser.heidi.ie/ Eraser is free and has a bunch of overwrite options, from 1 to 35 passes--but if you look at the list, you will see that many government and military standards are only a 3x random overwrite. ,,,,,, The way that most OS's restore previous versions of files is by an operating system feature, not by any technical aspect of the drives themselves. The OS does this by writing each new version at a different space on the drive. If you randomly-overwrite the whole drive even just once, ALL the versions will get corrupted. If even just the /previous/ drive write (in any single location) could possibly be recovered in any easy way with only the drive's own read/write hardware, then the drive would have 2X the capacity that it really does, and the hard drive companies would be capitalizing on that. And they're not. Indeed. Very well stated. Gunner, posting from a restaurant via cellphone hooked to cell phone Whenever a Liberal utters the term "Common Sense approach"....grab your wallet, your ass, and your guns because the sombitch is about to do something damned nasty to all three of them. |
#12
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Can a small industrial demagnetizer erase a hard drive
Martin Eastburn wrote:
The strong magnetic field might destroy the heads themselves. They are tiny and use very small wire in the loop. Martin On 5/25/2011 6:52 PM, wrote: On Wed, 25 May 2011 17:55:35 -0500, Ignoramus23924 wrote: On 2011-05-25, Bob La wrote: id wrote in message ... I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Reminds me of the ex girlfriend of one of my buddies back when Radio Shack had a real computer push. She was their computer guru. Usually she asked me or my buddy for help with anything as we were real computer nerds back then. One day she didn't ask us when she decided to erase an old Seagate MFM hard drive with a mag tape bulk eraser. When she powered it up you could hear that drive screaming 4 shops down the walkway in the mall. Hard drives have very powerful magnets in them. i Yes, but the flux of the head positioning magnets is very carefully controlled so that NONE of it flows through or across the platters, and NONE of it influences the read and write heads. The flux of those strong magnets is concentrated through the gap where the "voice coil" actuator armature works. And easily replaced (my NSA level techs). I'm thinking that if the magnet is stron enough to grab the drive from several inches away, whatever was written on it is toast. Unless it's the NSA level techs who are interested. Then YOU are toast... -- Richard Lamb http://www.home.earthlink.net/~cavelamb http://www.home.earthlink.net/~sv_temptress |
#13
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Can a small industrial demagnetizer erase a hard drive
wrote:
I will just crush them with a press. It is a bit painful because the hard drives are very strong, needing to contain shards of glass etc. This is wy I was looking for something less destructive. Blue tip wrench - slice them across and they are DONE. Or the band saw. Half should be good enough, quarter if you are paranoid. (VERY big grin!) YEAH, that would probably give the NSA guys fits... -- Richard Lamb http://www.home.earthlink.net/~cavelamb http://www.home.earthlink.net/~sv_temptress |
#14
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Can a small industrial demagnetizer erase a hard drive
DoN. Nichols wrote:
On 2011-05-25, Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. Likely not strong enough to *securely* erase the data. It might weaken things enough so the computer would have difficulty reading the disk, but for someone taking serious data-recovery measures, they would have no trouble. Note that the tape degausser for 9-track data tapes which I have has poles above and below the tape (so the field goes right through the tape), and the tape reel is spun between the poles while the platform slowly moves out so the whole of the tape passes between the poles. And -- there is a series capacitor in the tape degausser connected to resonate with the inductance of the coils (at 60 Hz, of course) to maximize the field (with a warning of extreme voltages within the case) -- so unless your industrial demagnetizer is constructed on similar lines, the odds are that it will not do very well at all. And -- I'm not sure about the coercivity of the media in the drives -- it may take a stronger field than the old mag tapes took. THe alternative is my press, which is more of a PITA. Give the kid(s) some torx screwdrivers, and a challenge to strip each drive as far down as they can -- saving the metric screws, and the bearings, and especially the head servo magnets. Most kids love to take things apart, especially male kids. Or -- take them down to your favorite outdoor shooting range, and see how many stacked up drives you can send various calibers through. If you get through all of them in a single shot, you have securely erased them *very* quickly. Or -- if you have always wanted to play with thermite, put each drive under a pile of thermite, and light it off. :-) Enjoy, DoN. DON! What have you been hiding??? -- Richard Lamb http://www.home.earthlink.net/~cavelamb http://www.home.earthlink.net/~sv_temptress |
#15
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Can a small industrial demagnetizer erase a hard drive
On 2011-05-26, Gunner Asch wrote:
Gunner, posting from a restaurant via cellphone hooked to cell phone How exactly are they hooked? |
#16
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Can a small industrial demagnetizer erase a hard drive
On Wed, 25 May 2011 23:28:02 -0500, Ignoramus23924
wrote: On 2011-05-26, Gunner Asch wrote: Gunner, posting from a restaurant via cellphone hooked to cell phone How exactly are they hooked? Google Android + tether Via charging/data port on cell phone Gunner Whenever a Liberal utters the term "Common Sense approach"....grab your wallet, your ass, and your guns because the sombitch is about to do something damned nasty to all three of them. |
#17
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Can a small industrial demagnetizer erase a hard drive
On May 25, 11:30*am, Ignoramus23924 ignoramus23...@NOSPAM.
23924.invalid wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Drill a hole through the critter and shatter the platters. If I had a bunch I'd make up a quick set of 1/4 or 1/8 inch punches for my dake arbor press, set up like a spot welder- hold the platter between the punches, pull the lever until you hear "crunch", repeat. Of course you can never have enough head control magnets... Dave |
#18
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Can a small industrial demagnetizer erase a hard drive
On Wed, 25 May 2011 23:28:02 -0500, Ignoramus23924
wrote: On 2011-05-26, Gunner Asch wrote: Gunner, posting from a restaurant via cellphone hooked to cell phone How exactly are they hooked? I believe he meant to say "laptop hooked to a cell phone", Ig. -- Education should provide the tools for a widening and deepening of life, for increased appreciation of all one sees or experiences. It should equip a person to live life well, to understand what is happening around him, for to live life well one must live life with awareness. -- Louis L'Amour |
#19
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Can a small industrial demagnetizer erase a hard drive
A little slow there?
"cellphone" is a noun. "cell phone" is a noun and an adjective (descriptive noun) --------- "Larry Jaques" wrote in message ... I believe he meant to say "laptop hooked to a cell phone", Ig. -- Education - get some |
#20
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Can a small industrial demagnetizer erase a hard drive
On 2011-05-25, Ignoramus23924 wrote:
I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Thanks to all. Just a little update. I did put them on a demagnetizer, just in case. Then I destroyed them in a press. http://igor.chudov.com/tmp/Hard-Drives.jpg i |
#21
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Can a small industrial demagnetizer erase a hard drive
On 2011-05-26, wrote:
On Wed, 25 May 2011 19:57:44 -0500, Ignoramus23924 wrote: On 2011-05-26, wrote: [ ... ] Or the band saw. Half should be good enough, quarter if you are paranoid. Not if the platters are made of glass. i Better than 90% are aluminum. Of all the drives I've destroyed over the last 20+ years, I've never run across one with glass platters. Wer're up in the hundreds - ranging from full height 5 1/4" SASI drives to 2 1/2 inch sata drives. Hmm ... never attacked any more serious ones -- e.g. the 8" SMD interface drives like the Fujitsu M2312K, or the 10" SMD interface ones like the Fujitsu Eagle, or even the 14" washing machine drives (also SMD interface). And there were even some with hydraulic head positioners, or with many fixed heads with up to 4 foot diameter platters. :-) Enjoy, DoN. -- Remove oil spill source from e-mail 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 --- |
#22
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Can a small industrial demagnetizer erase a hard drive
On 26 May 2011 23:33:42 GMT, "DoN. Nichols"
wrote: On 2011-05-26, wrote: On Wed, 25 May 2011 19:57:44 -0500, Ignoramus23924 wrote: On 2011-05-26, wrote: [ ... ] Or the band saw. Half should be good enough, quarter if you are paranoid. Not if the platters are made of glass. i Better than 90% are aluminum. Of all the drives I've destroyed over the last 20+ years, I've never run across one with glass platters. Wer're up in the hundreds - ranging from full height 5 1/4" SASI drives to 2 1/2 inch sata drives. Hmm ... never attacked any more serious ones -- e.g. the 8" SMD interface drives like the Fujitsu M2312K, or the 10" SMD interface ones like the Fujitsu Eagle, or even the 14" washing machine drives (also SMD interface). And there were even some with hydraulic head positioners, or with many fixed heads with up to 4 foot diameter platters. :-) Enjoy, DoN. You are talking "antique" dasdis |
#23
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Can a small industrial demagnetizer erase a hard drive
On 2011-05-27, wrote:
On 26 May 2011 23:33:42 GMT, "DoN. Nichols" wrote: On 2011-05-26, wrote: [ ... ] Better than 90% are aluminum. Of all the drives I've destroyed over the last 20+ years, I've never run across one with glass platters. Wer're up in the hundreds - ranging from full height 5 1/4" SASI drives to 2 1/2 inch sata drives. Hmm ... never attacked any more serious ones -- e.g. the 8" SMD interface drives like the Fujitsu M2312K, or the 10" SMD interface ones like the Fujitsu Eagle, or even the 14" washing machine drives (also SMD interface). And there were even some with hydraulic head positioners, or with many fixed heads with up to 4 foot diameter platters. :-) [ ... ] You are talking "antique" dasdis Well ... sort of -- though I've used the 8" ones (Fujitsu M2312K -- 84 MB) at home -- back around 1980 or so. And on my unix box, I didn't call them "DASD"s -- I might have if I had a mainframe at home, but no room and no power for that. :-) Enjoy, DoN. -- Remove oil spill source from e-mail 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 --- |
#24
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Can a small industrial demagnetizer erase a hard drive
On 26 May 2011 23:33:42 GMT, "DoN. Nichols"
wrote: On 2011-05-26, wrote: On Wed, 25 May 2011 19:57:44 -0500, Ignoramus23924 wrote: On 2011-05-26, wrote: [ ... ] Or the band saw. Half should be good enough, quarter if you are paranoid. Not if the platters are made of glass. i Better than 90% are aluminum. Of all the drives I've destroyed over the last 20+ years, I've never run across one with glass platters. Wer're up in the hundreds - ranging from full height 5 1/4" SASI drives to 2 1/2 inch sata drives. Hmm ... never attacked any more serious ones -- e.g. the 8" SMD interface drives like the Fujitsu M2312K, or the 10" SMD interface ones like the Fujitsu Eagle, or even the 14" washing machine drives (also SMD interface). And there were even some with hydraulic head positioners, or with many fixed heads with up to 4 foot diameter platters. :-) Enjoy, DoN. In 1975 or '76 I was working in a machine shop for the first time. I would work 3 months straight 10 hours a day (really! I was young!) doing the turning and boring work on cast iron motor housings for IBM. The cycle time was just under 15 minutes each so I made 40 per day. I'd get a couple months of 5 and 6 day weeks and then another run of 3 months on those damn castings. I only found out years later they were for big magnetic disc drives. I think they were for either the 3330 or 3340 drives. Eric |
#25
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Can a small industrial demagnetizer erase a hard drive
On 27 May 2011 02:52:24 GMT, "DoN. Nichols"
wrote: On 2011-05-27, wrote: On 26 May 2011 23:33:42 GMT, "DoN. Nichols" wrote: On 2011-05-26, wrote: [ ... ] Better than 90% are aluminum. Of all the drives I've destroyed over the last 20+ years, I've never run across one with glass platters. Wer're up in the hundreds - ranging from full height 5 1/4" SASI drives to 2 1/2 inch sata drives. Hmm ... never attacked any more serious ones -- e.g. the 8" SMD interface drives like the Fujitsu M2312K, or the 10" SMD interface ones like the Fujitsu Eagle, or even the 14" washing machine drives (also SMD interface). And there were even some with hydraulic head positioners, or with many fixed heads with up to 4 foot diameter platters. :-) [ ... ] You are talking "antique" dasdis Well ... sort of -- though I've used the 8" ones (Fujitsu M2312K -- 84 MB) at home -- back around 1980 or so. And on my unix box, I didn't call them "DASD"s -- I might have if I had a mainframe at home, but no room and no power for that. :-) Enjoy, DoN. In the computer world 1980 IS antique!!!! |
#26
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Can a small industrial demagnetizer erase a hard drive
Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Thanks Remove the platters from the drives and sandblast the oxide layer off in your sandblaster. Even the noted NSA level techs will not be able to recover data from a pile of mixed platter dust. |
#27
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Can a small industrial demagnetizer erase a hard drive
In article ,
Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Not likely strong enough. My standard approach is pounding the disk into a shapeless blob using a five-pound hammer and an anvil. I put the drive in a freezer bag (heavy polyethylene) first so the parts don't fly everywhere. Joe Gwinn |
#28
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Can a small industrial demagnetizer erase a hard drive
On Thu, 26 May 2011 07:26:05 -0700, Larry Jaques
wrote: On Wed, 25 May 2011 23:28:02 -0500, Ignoramus23924 wrote: On 2011-05-26, Gunner Asch wrote: Gunner, posting from a restaurant via cellphone hooked to cell phone How exactly are they hooked? I believe he meant to say "laptop hooked to a cell phone", Ig. Blink blink.....sigh...indeed. It was late..and Id had a very busy day. Sorry guys. Gunner, home a day early..because all my clients closed for 4 days off. (4 days of cleaning up/out Stuff!!) Btw..puppies are ready!! One could not be a successful Leftwinger without realizing that, in contrast to the popular conception supported by newspapers and mothers of Leftwingers, a goodly number of Leftwingers are not only narrow-minded and dull, but also just stupid. Gunner Asch |
#29
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Can a small industrial demagnetizer erase a hard drive
On 2011-05-27, Joseph Gwinn wrote:
In article , Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Not likely strong enough. My standard approach is pounding the disk into a shapeless blob using a five-pound hammer and an anvil. I put the drive in a freezer bag (heavy polyethylene) first so the parts don't fly everywhere. You cannot do that with a 5 lb sledge. The hard drive will not break. i |
#30
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Can a small industrial demagnetizer erase a hard drive
In article ,
Ignoramus6479 wrote: On 2011-05-27, Joseph Gwinn wrote: In article , Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Not likely strong enough. My standard approach is pounding the disk into a shapeless blob using a five-pound hammer and an anvil. I put the drive in a freezer bag (heavy polyethylene) first so the parts don't fly everywhere. You cannot do that with a 5 lb sledge. The hard drive will not break. Really? It works well enough for my purposes. Maybe NSA could get data off the result, but nobody else can. I use a drilling hammer and big boulder. But you are free to use any size hammer you can swing. Joe Gwinn |
#31
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Can a small industrial demagnetizer erase a hard drive
On 2011-05-28, Joseph Gwinn wrote:
In article , Ignoramus6479 wrote: On 2011-05-27, Joseph Gwinn wrote: In article , Ignoramus23924 wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Not likely strong enough. My standard approach is pounding the disk into a shapeless blob using a five-pound hammer and an anvil. I put the drive in a freezer bag (heavy polyethylene) first so the parts don't fly everywhere. You cannot do that with a 5 lb sledge. The hard drive will not break. Really? It works well enough for my purposes. Maybe NSA could get data off the result, but nobody else can. I use a drilling hammer and big boulder. But you are free to use any size hammer you can swing. Joe, a while ago, I tried pounding hard drives with a 8 lb sledge on concrete. While I am sure that the first blow will render is inoperable, I was very surprised to find that the drive remained physically intact. After perhaps 20 blows, the hard drive has been seriously scratched up, but still essentially intact. |
#32
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Can a small industrial demagnetizer erase a hard drive
Ignoramus21144 wrote:
On 2011-05-28, Joseph wrote: In , wrote: On 2011-05-27, Joseph wrote: In articlestydnXDVoa8dvUDQnZ2dnUVZ_qydnZ2d@giganews. com, wrote: I have a little industrial demagnetizer from a grinding shop. Can this thing erase contents of hard drives securely? Or the magnetic field is not string enough? I have a pile of old HDs awaiting destruction. THe alternative is my press, which is more of a PITA. Not likely strong enough. My standard approach is pounding the disk into a shapeless blob using a five-pound hammer and an anvil. I put the drive in a freezer bag (heavy polyethylene) first so the parts don't fly everywhere. You cannot do that with a 5 lb sledge. The hard drive will not break. Really? It works well enough for my purposes. Maybe NSA could get data off the result, but nobody else can. I use a drilling hammer and big boulder. But you are free to use any size hammer you can swing. Joe, a while ago, I tried pounding hard drives with a 8 lb sledge on concrete. While I am sure that the first blow will render is inoperable, I was very surprised to find that the drive remained physically intact. After perhaps 20 blows, the hard drive has been seriously scratched up, but still essentially intact. You need a bigger hammer. John |
#33
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Can a small industrial demagnetizer erase a hard drive
john wrote: Ignoramus21144 wrote: ? On 2011-05-28, Joseph ? wrote: ?? In ?, ?? ? wrote: ?? ??? On 2011-05-27, Joseph ? wrote: ???? In article?stydnXDVoa8dvUDQnZ2dnUVZ_qydnZ2d@giganews. com?, ???? ? wrote: ???? ????? I have a little industrial demagnetizer from a grinding shop. Can this ????? thing erase contents of hard drives securely? Or the magnetic field is ????? not string enough? I have a pile of old HDs awaiting destruction. ????? ????? THe alternative is my press, which is more of a PITA. ???? ???? Not likely strong enough. ???? ???? My standard approach is pounding the disk into a shapeless blob using a ???? five-pound hammer and an anvil. I put the drive in a freezer bag (heavy ???? polyethylene) first so the parts don't fly everywhere. ??? ??? You cannot do that with a 5 lb sledge. The hard drive will not break. ?? ?? Really? It works well enough for my purposes. Maybe NSA could get data ?? off the result, but nobody else can. I use a drilling hammer and big ?? boulder. ?? ?? But you are free to use any size hammer you can swing. ?? ? ? Joe, a while ago, I tried pounding hard drives with a 8 lb sledge on ? concrete. ? ? While I am sure that the first blow will render is inoperable, I was ? very surprised to find that the drive remained physically ? intact. After perhaps 20 blows, the hard drive has been seriously ? scratched up, but still essentially intact. You need a bigger hammer. Or to exercise more, so he can swing the hammer properly. Too much time behind a keyboard and with automated tools makes you weak. -- It's easy to think outside the box, when you have a cutting torch. |
#34
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Can a small industrial demagnetizer erase a hard drive
"Michael A. Terrell" writes:
john wrote: Ignoramus21144 wrote: ? On 2011-05-28, Joseph ? wrote: ?? In ?, ?? ? wrote: ?? ??? On 2011-05-27, Joseph ? wrote: ???? In article?stydnXDVoa8dvUDQnZ2dnUVZ_qydnZ2d@giganews. com?, ???? ? wrote: ???? ????? I have a little industrial demagnetizer from a grinding shop. Can this ????? thing erase contents of hard drives securely? Or the magnetic field is ????? not string enough? I have a pile of old HDs awaiting destruction. ????? ????? THe alternative is my press, which is more of a PITA. ???? ???? Not likely strong enough. ???? ???? My standard approach is pounding the disk into a shapeless blob using a ???? five-pound hammer and an anvil. I put the drive in a freezer bag (heavy ???? polyethylene) first so the parts don't fly everywhere. ??? ??? You cannot do that with a 5 lb sledge. The hard drive will not break. ?? ?? Really? It works well enough for my purposes. Maybe NSA could get data ?? off the result, but nobody else can. I use a drilling hammer and big ?? boulder. ?? ?? But you are free to use any size hammer you can swing. ?? ? ? Joe, a while ago, I tried pounding hard drives with a 8 lb sledge on ? concrete. ? ? While I am sure that the first blow will render is inoperable, I was ? very surprised to find that the drive remained physically ? intact. After perhaps 20 blows, the hard drive has been seriously ? scratched up, but still essentially intact. You need a bigger hammer. Or to exercise more, so he can swing the hammer properly. Too much time behind a keyboard and with automated tools makes you weak. Open it up, put a propane torch to it until it glows. -- "Erwin, do you know what happened to the cat?" -- Mrs. Shroedinger |
#35
Posted to rec.crafts.metalworking
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Can a small industrial demagnetizer erase a hard drive
Joe Pfeiffer wrote: "Michael A. Terrell" ? writes: ? john wrote: ?? ?? Ignoramus21144 wrote: ?? ? On 2011-05-28, Joseph ? wrote: ?? ?? In ?, ?? ?? ? wrote: ?? ?? ?? ??? On 2011-05-27, Joseph ? wrote: ?? ???? In article?stydnXDVoa8dvUDQnZ2dnUVZ_qydnZ2d@giganews. com?, ?? ???? ? wrote: ?? ???? ?? ????? I have a little industrial demagnetizer from a grinding shop. Can this ?? ????? thing erase contents of hard drives securely? Or the magnetic field is ?? ????? not string enough? I have a pile of old HDs awaiting destruction. ?? ????? ?? ????? THe alternative is my press, which is more of a PITA. ?? ???? ?? ???? Not likely strong enough. ?? ???? ?? ???? My standard approach is pounding the disk into a shapeless blob using a ?? ???? five-pound hammer and an anvil. I put the drive in a freezer bag (heavy ?? ???? polyethylene) first so the parts don't fly everywhere. ?? ??? ?? ??? You cannot do that with a 5 lb sledge. The hard drive will not break. ?? ?? ?? ?? Really? It works well enough for my purposes. Maybe NSA could get data ?? ?? off the result, but nobody else can. I use a drilling hammer and big ?? ?? boulder. ?? ?? ?? ?? But you are free to use any size hammer you can swing. ?? ?? ?? ? ?? ? Joe, a while ago, I tried pounding hard drives with a 8 lb sledge on ?? ? concrete. ?? ? ?? ? While I am sure that the first blow will render is inoperable, I was ?? ? very surprised to find that the drive remained physically ?? ? intact. After perhaps 20 blows, the hard drive has been seriously ?? ? scratched up, but still essentially intact. ?? ?? You need a bigger hammer. ? ? ? Or to exercise more, so he can swing the hammer properly. Too much ? time behind a keyboard and with automated tools makes you weak. Open it up, put a propane torch to it until it glows. I prefer using the drive's built in software to destroy the data, but to some people everything looks like a loose railroad spike. -- It's easy to think outside the box, when you have a cutting torch. |
#36
Posted to rec.crafts.metalworking
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Can a small industrial demagnetizer erase a hard drive
We've disassembed and destroyed a number of drives, large [old Barracuda's with magnesium housings...] and small [laptop]. Some have glass platters, many don't. Most have a good selection of tiny screws. All have interesting magnets and the other parts succumb to the 20 ton HF press. -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
#37
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Can a small industrial demagnetizer erase a hard drive
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#38
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Can a small industrial demagnetizer erase a hard drive
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#39
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Can a small industrial demagnetizer erase a hard drive
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#40
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Can a small industrial demagnetizer erase a hard drive
The OP died three months ago.
---------- "J. Clarke" wrote in message in.local... Really gets down to how thoroughly you want it destroyed. Want to do it thoroughly, grind the platters to dust, mix the dust with Thermite, burn the Thermite, then spread the results over the Pacific. |
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