In article <534c68f4....@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. Pre-VM OS/360 may not have. R's, John
