Not getting more than 65000 IOPS with xtreme setup

[alfaunits]

I am not sure about the 65k limit... Napalm was messing around with MFT and was able to hit 300k+ IOPS with RAM:
http://www.xtremesystems.org/forums/...&postcount=558

You realize the card cannot achieve that kind of speed even if it were a double ARC1231?
PCI-e x8 is capped at 2GB/s, and realistic limit is around 1.5GB/s.
I donno how he got the numbers, but they aren't real

@OP: I think you won't be able to physically achieve more than that, and it has little to do with the card, but the Mtrons.
In best case scenario, the ranom I/O would be split across each drive in order, but in reality it will never happen ;( So you're going with mathematical probability here, which at 8 drives, presuming the stripe is the same as the block used for the random I/O, I think is 4 drives, i.e. after 5 I/Os you'll most probably hit one of the previous drives and thus cap the IOPs.

IIRC, a single Mtron does ~17000 random IOPs, so that makes perfect sense for 4x17000 = ~65000 IOPs.