persistence-across-reboot; was Re: [Oberon] Re. HOW2 'magnify view' for BB?Aos?A2?

Jack Johnson knapjack at
Tue Apr 13 22:24:39 MEST 2010

On Tue, Apr 13, 2010 at 12:11 PM, <peasthope at> wrote:

> Why is such persistence absent from desktop and
> laptop systems?

Most new OSes support hibernation (if the underlying hardware supports it),
which saves the contents of RAM and the system state to disk and then powers
down (which is different from sleep, where the contents of RAM are kept on
life support at a lower power utilization).

For some hardware, the difference between hibernation and sleep is minimal
for a sub-24-hour window.

Neither of these is real persistence, though, like what you might find in a
Smalltalk VM or something similar.  And yep, some software does not take
kindly to dramatic changes in the system clock.

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