Re: You can get it back
> check out magnetic remnance imaging of hard disks
It exists in theory.
Not available commercially because the costs are prohibitive. Also not proven that it is better at recovering meaningful information in real life after a secure erase, compared to the less expensive recovery options.
There is too much mythology being sold around regarding the secure erasing of HDD's (spinning rust). For example, there's no need for 38 write-zero passes. Even 3 passes are overkill. A write-zero pass followed by a write-random pass are more than sufficient.
If HDD's were so unreliable at writing 0's during a write-zero pass, how do they handle the reliable writing and storage of real data in the first place?