On Donnerstag, 4. Oktober 2007, Hans-Werner Hilse wrote: > Hi, > > On Thu, 4 Oct 2007 15:47:53 +0200 Alan McKinnon > > <[EMAIL PROTECTED]> wrote: > > On Thursday 04 October 2007, Liviu Andronic wrote: > > > And later on: "Now one problem is > > > left. Even with normal RAM a well funded organisation can get the > > > contents after the system is powered off. With the modern SDRAM it's > > > even worse, where the data stays on the RAM permanently until new > > > data is written. > > > > Pray tell, how does RAM manage to retain data when the power is off? > > It's either six transistors or one transistor and a cap per cell = > > not persistent. > > In theory, for the one transistor and one cap case, you have a loaded > cap that will take "forever" losing its load, won't it? But in > practice, I think, that's not realistic.
in practice, the ram has to refreshed every few cycles (on reason why it is slow) because it is loosing its load so fast. In practice, after power is cut, everything in ram is lost. But not the stuff in swap.... -- [EMAIL PROTECTED] mailing list
