On Mon, February 8, 2016 5:45 pm, John R Pierce wrote: > On 2/8/2016 3:33 PM, Valeri Galtsev wrote: >> DRAM had more persistent imprint of information that was sitting in it, >> which appears much harder to destroy than information on hard drive. > > well aware of that. 30 years ago a friend and I built a specialized > video card for a consulting project.... discovered on the prototype > that we could power it down, go home, come back the next day, and power > it up, and sufficient image remained in the DRAM to be totally > recognizable. sure, it had 'noise' bits all over it, but whatever was > on the screen the day before was still visible. > This is amazing! That is what distinguishes experts from us mortals: what we just learned by reading they saw themselves (sometimes quite a while ago)! On the other hand, why I'm so surprised? This is why they can answer any of our questions on this list in a split second. Still, I'm very impressed! Valeri ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++