Re: Does the Linux kernel for alpha support CONFIG_PREEMPT?
On Sun, Sep 09, 2007 at 10:06:11PM -0400, Tom Evans wrote:
> I have done (and still do raid5) without performance impact (especially
> what I saw when the card was in a different slot).
> I will redo that array as raid5 to see if it makes a difference - I know
> software raid is expensive, just figured 6 wouldn't be too much more cpu
> intensive than level 5.
I suspect raid6 uses more than twice the cpu overhead of raid5. raid5
is just parity, but raid6 has to do a bit more than just simple parity.