Zeroing Out HD..How Long?

[Black]

space-time wrote:
can one store 2 TB of data on a single 1 TB drive? just write the drive with 1 TB of data, erase it and write again 1 TB of new data. Then one can read the new data the regular way, and the old data if one uses a PC and some software, right?

seems like a no brainer to double the capacity for very little effort.

or you could perhaps increase the capacity 8x ?

You really shouldn't dole out ideas like this for free.
Get thee to a patent attorney, go!