I read here and there that it is supposedly enough to overwrite the hard drive with zeros just once.
But then I read somewhere else that it is necessary to overwrite with zeros several times so that no more data can be restored
what is true now?
(1 votes)
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Depending on what a plate it is now and how it is done in the recovery process, as possible white also overwrite 1 times
But more is usually better
…. both, the more often the safer it becomes, this applies to mechanical hard drives, with SSD’s once they have a unique memory cell.
mash
all right, thank you
Even me in prof. Data recovery lab can no longer do after a single overwrite…
Security refers only to future developments. However, the actual effort is not really taken into account.
So if you were to invest the equivalent of a house in 20 years, you could possibly restore something. For the normal user, however, this is completely irrelevant because no one would invest this sum for Grandma Irma's data.
That's wrong! SSDs have the 2-4 small storage space and because of the wear leveling all storage cells are used – but only a fraction of it is available to the user.
Therefore, you should not overwrite SSDs but delete them using Secure Erase (Kryptoerase).
It depends.
… have called me to my previous experience, have also been able to extract data from overwritten hard drives (mechanical), but it is unequally more complicated than who has only been deleted or formatted the disk.
With the SSD emergency reserve, you are right, of course, but the access is limited….
No it doesn’t come – I’ve broken up enough SSDs and examined the chips. There’s more than enough reserve storage on it everywhere. With newer USB sticks, the double of memory is often installed.
This is simply because TLC and QLC memory cells hold only 300 – 3000 write operations until you fail. For this purpose, the memory is very cheap – therefore sufficient reserve memory space is also provided to replace failed cells.
Buy a cheap SSD, undold the chips and read them with a chip programmer!
Then I’ll suggest you sign up with various government agencies. They’ll weigh your weight in gold when you get it. Because the TOP experts in the IT-Forensics area fail…
When formatting, only the file system catalog is overwritten. Everyone gets this with a 60 Euro software at the latest after a YouTube tutorial. This has nothing to do with overwriting the data.
Zeros of the plate is not equal to formatting. One lasts only seconds and the other hours.
For Windows, you can zero the plate if you take the Faken out when formatting quickly!
Since, besides you, the one about the firmware that we can do IT researchers in some cases just to find data remains. Compared to the few thousand reserve sectors or few MB of reserve data of an HDD, there is much more to get TRIM shouldn’t have run yet…
…. the safest method is the use of a degausser. After that, no one can make anything because the plate is physically scrap.
Well, I wanted to sell the hard drive, so…
Multiple formatting is safer than just once.