Peter T. Breuer <ptb@xxxxxxxxxxxxxx> wrote:
> No, call it "p". That is the correct name. And I presume you mean "an
> error", not "a failure".
I'll do this thoroughly, so you can see how it goes.
Let
p = probability of a detectible error occuring on a disk in a unit time
p'= ................ indetectible .....................................
Then the probability of an error occuring UNdetected on a n-disk raid
array is
(n-1)p + np'
and on a 1 disk system (a 1-disk raid array :) it is
p'
OK? (hey, I'm a mathematician, it's obvious to me).
Exercise .. calculate effect of majority voting!
Peter
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
