On Fri, 8 Aug 2008, Henrik wrote:
> It feels like there is something fishy going on. Maybe the RAID 10
> implementation on the PERC/6e is crap?
Normally, when a SATA implementation is running significantly faster than
a SAS one, it's because there's some write cache in the SATA disks turned
on (which they usually are unless you go out of your way to disable them).
Since all non-battery backed caches need to get turned off for reliable
database use, you might want to double-check that on the controller that's
driving the SATA disks.
--
* Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD