If you're a big defense contractor, after a year it possibly costs less than replacing every hard drive that you might smash just because it needed secure erasure.
You can still retrieve the data even if you blow it up with TNT...unbelievable as it sound. However, Rewriting the drive 500 times per sector would do the trick of secure data removal, ironically.
just stumbled on this video... though this is a two year old comment, I have to agree with you.
i forget the technical jargon but data always leaves a signature, even if you magnetically erase it, it can still be reconstructed, kind of like a 'residue' left on the drive for a lack of a better term.
but if you overwrite it many many times with random data on each pass (500 times in your example) this masks the signature. then you fill it with legitimate but not sensitive data to mask it further
Indeed and old comment....man I have since graduated from university and gotten so much older and wiser... anyway, the term I think is data remanence. but according to wiki referring to CMRR, most ATA drives > 15GB can be securely erased after just one overwrite....even NSA agrees...
well you have to consider the source, and what 'secure' means...
i know if I were the NSA, i wouldn't be telling you how to 'absolutely secure your drive' if i didn't have a way to recover it!
imagine if terrorists could secure their drives with a magnet... no. this is security that works for most people who might look at it, it isn't absolute.
'i forget the technical jargon but data always leaves a signature, even if you magnetically erase it, it can still be reconstructed'
With erasure of this magnitude, reconstruction is impossible short of buying a new drive and restoring from a backup.
If you degauss the platters to the point where you obliterate low level formatting, you'll also completely obliterate the high level formatting and ALL data contained within it with absolutely, positively no chance of recovery.
@Watcher3223 Supposedly the magnetism slightly modifies the formation of the metal itself, and degaussing it does not completely undo what happens to the metallic structure. Apparently with the right equipment, it can be recovered from the very metal itself. From what I hear, anyway.
"Supposedly the magnetism slightly modifies the formation of the metal itself, and degaussing it does not completely undo what happens to the metallic structure."
That's a bit of a stretch.
When you hit a hard drive with a bulk magnetic tape eraser, it's very akin to a bull in a china shop.
There is nothing subtle or gentle about the magnetism coming from a huge electromagnet running under AC mains power where such a scenario could be probable.
Эту технику вы можете приобрести в Московской фирме Ультрадиск.
MrUltradisk 9 months ago
Mrf mrrble mfrf mrr mrflfmm
i8246i 2 years ago
Rewriting the drive several hundred passes and then scrambling it with a neodymium magnet should do the trick.
FrosDOwnz 2 years ago
magnest desroying a hdd haha if its flash wave then ti can destroy but normaly not always
cotton509 3 years ago
A few companies I've worked for in the past simply shreaded the drives in a large machine - not a paper shreader.
pmgodfrey 3 years ago
What's the music track? I like it alot!
danwat1234 3 years ago
ya, but can you use the HD again?
Computerfreaq15 4 years ago
Seriously... If you need data erased that bad, Destroy the drive!! How much does that Hard Driver Eraser cost???
Marmbo 5 years ago
If you're a big defense contractor, after a year it possibly costs less than replacing every hard drive that you might smash just because it needed secure erasure.
te4s80txmt 4 years ago
You can still retrieve the data even if you blow it up with TNT...unbelievable as it sound. However, Rewriting the drive 500 times per sector would do the trick of secure data removal, ironically.
isferos 4 years ago
just stumbled on this video... though this is a two year old comment, I have to agree with you.
i forget the technical jargon but data always leaves a signature, even if you magnetically erase it, it can still be reconstructed, kind of like a 'residue' left on the drive for a lack of a better term.
but if you overwrite it many many times with random data on each pass (500 times in your example) this masks the signature. then you fill it with legitimate but not sensitive data to mask it further
gwilendiel 2 years ago
Indeed and old comment....man I have since graduated from university and gotten so much older and wiser... anyway, the term I think is data remanence. but according to wiki referring to CMRR, most ATA drives > 15GB can be securely erased after just one overwrite....even NSA agrees...
isferos 2 years ago
well you have to consider the source, and what 'secure' means...
i know if I were the NSA, i wouldn't be telling you how to 'absolutely secure your drive' if i didn't have a way to recover it!
imagine if terrorists could secure their drives with a magnet... no. this is security that works for most people who might look at it, it isn't absolute.
gwilendiel 2 years ago
'i forget the technical jargon but data always leaves a signature, even if you magnetically erase it, it can still be reconstructed'
With erasure of this magnitude, reconstruction is impossible short of buying a new drive and restoring from a backup.
If you degauss the platters to the point where you obliterate low level formatting, you'll also completely obliterate the high level formatting and ALL data contained within it with absolutely, positively no chance of recovery.
Watcher3223 1 year ago
@Watcher3223 Supposedly the magnetism slightly modifies the formation of the metal itself, and degaussing it does not completely undo what happens to the metallic structure. Apparently with the right equipment, it can be recovered from the very metal itself. From what I hear, anyway.
gwilendiel 1 year ago
"Supposedly the magnetism slightly modifies the formation of the metal itself, and degaussing it does not completely undo what happens to the metallic structure."
That's a bit of a stretch.
When you hit a hard drive with a bulk magnetic tape eraser, it's very akin to a bull in a china shop.
There is nothing subtle or gentle about the magnetism coming from a huge electromagnet running under AC mains power where such a scenario could be probable.
Watcher3223 1 year ago