I remember that the c’t, an excellent German computer magazine, around 2005 ran a test with once-zeroed hard-drives: They sent it to a lot of companies to recover the data, but all of them refused to give a quote, saying that the task was impossible.
Most of these companies manage to recover data from technically defect hard-drives after mechanical failures, and it costs several thousand dollars, but none of them were ready to help in case of zeroed out drives.
I agree.
I remember that the c’t, an excellent German computer magazine, around 2005 ran a test with once-zeroed hard-drives: They sent it to a lot of companies to recover the data, but all of them refused to give a quote, saying that the task was impossible.
Most of these companies manage to recover data from technically defect hard-drives after mechanical failures, and it costs several thousand dollars, but none of them were ready to help in case of zeroed out drives.