On Sat, 2008-01-12 at 20:16 +0800, Orlando Andico wrote: > If you write all zero or all one to the disk, it's still > technically possible to get the data back. The original > data "sticks up" or "sticks down" out of the constant > 1's or 0's.
OK. how hard is that to do though? I take it seagate or fujitsu would be able to do it? No national government three letter agencies required? > The US DoD has a standard for scrubbing, which is: > - overwrite with all 1's three times > - overwrite with all 0's three times > - overwrite with random three times Yeah, I'd read about that. > The main thing is to overwrite with a non-constant pattern > so that the original data is difficult to extract. as you say, I suppose some cheap random is what you want for normal commercial purposes (although perhaps some strong random if you're trying to hide something from NSA or CIA). tiger _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List [email protected] (#PLUG @ irc.free.net.ph) Read the Guidelines: http://linux.org.ph/lists Searchable Archives: http://archives.free.net.ph
