Hard disk bottle neck.

[Wojciech Puchar]

> #ifndef MAXDUMPPGS
>
> I'll update the result. I'll tell you how I go. Maybe sometimes in the next
> fortnight.
>
> Thanks everyone, thanks Wojciech Puchar,
>
> Danny

anyway - how your RAID5 is configured? didn't you selected SMALL stripe 
sizes?

this way - every large read uses 3 disks in parallel, instead of spreading 
multiple reads on multiple disks.

RAID5 performance is high on reads, when configured properly, and when the 
RAID solution is right.