That is indeed one important question, but there was another one, the
question of whether this was a denial of service attack exposure, which i
t
is not.  I'm not disagreeing that it would be nice if there were some sor
t
of "are you sure" safety net before the system proceeded to try to do
something suicidal, but that's a design and requirements question, not a
defect question.

- Bill Holder, z/VM Development, IBM

On Thu, 17 Sep 2009 17:36:44 -0400, David Boyes <dbo...@sinenomine.net> w
rote:

>On 9/17/09 2:16 PM, "Adam Thornton" <athorn...@sinenomine.net> wrote:
>
> 
>> "Administrator typo" is not a failure mode the operating system is
>> designed to protect you from.
>
>That may be true now, but I think the point of the argument is that it
>should not be. 
>
>On VMS, if you have a SYSTEM priv bit set, the system will still warn yo
u if
>you're about to do something that seems stupid. If there is an architect
ed
>limit (note that the 9.7TB got clipped to 8TB, so SOMETHING noticed a
>problem), then it's not too unreasonable for the system to take defensiv
e
>measures and issue a warning that all is not right in in the kingdom of
>Denmark, cream or no cream dresses.
>
>It seems like a basic defense that if CP notices you starting something 
that
>it KNOWS it may not have resources to complete, requiring confirmation t
hat
>you know what you're doing (or about to do) is a good defensive measure.

>
>Did the system do what you told it to do when you told it to do it? Yes.

>Whether it should march off a cliff without at least questioning the ord
er
>is the question at hand.
>
>-- db
>========================
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