On 04/14/2014 05:50 PM, John Levine wrote:
In article <534C68F4.305@cox.net> you write:
On 4/14/2014 9:38 AM, Matthew Black wrote:
Shouldn't a decent OS scrub RAM and disk sectors before allocating them to processes, unless that process enters processor privileged mode and sets a call flag? I recall digging through disk sectors on RSTS/E to look for passwords and other interesting stuff over 30 years ago.
I have been out of the loop for quite a while but my strongly held belief is that such scrubbing would be an enormous (and intolerable) overhead ...
It must be quite a while. Unix systems have routinely cleared the RAM and disk allocated to programs since the earliest days.
When you say "clear the disk allocated to programs" what do you mean exactly?