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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.

Len Sorensen

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