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#1
Why are there so many data wipe/erase methods for HDD?
Hi, I was recovering the data of an old HDD and I noticed in the software a section to wipe all the data from an HDD. I saw fill all with 0's, fill all with 1's, fill all with 0's then with 1's, then you could select the number of times the wiping was performed...
I was thinking, if you fill all the HDD with 0's, how in heavens one person could recover data from there?
What am I missing?
I've read that HDD have tracks with bumps and holes, meaning 1's and 0's. If you make all of those bumps, it's impossible to know the previous state of the track.