RC-208 NON-Raid

29397493/68689192 Newegg.com

Hardware 
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CPU :Sempron 3000+

Mother Board :FIC K7MNF-64 nforce2 chipsets

Memory: 1G DDR PC2700

VGA Card :nvidia gf4 mx400

Hard Disk :5x500G Seagate/Maxtor 1x300G Maxtor

Optical Drive :Lite-On DVDRW DL

Other Important Party peripheral devices) :

Software: 

---------------------- 
Operation System :Solaris 10 x86 & Solaris Express b70

Other software :raidz pool

Currently Running Solaris Express b70 - b76 (bfu ON). I get all sorts of DMA mode messages in /var/adm/messages showing a possible DMA issue.

Here is the entry from the log:
Nov  1 16:00:25 solaris-devx unix: [ID 954099 kern.info] NOTICE: IRQ21 is being shared by drivers with different interrupt levels.
Nov  1 16:00:25 solaris-devx This may result in reduced system performance.
Nov  1 16:00:25 solaris-devx pci: [ID 370704 kern.notice] PCI-device: pci1509,927a@6, ich0
Nov  1 16:00:25 solaris-devx genunix: [ID 936769 kern.notice] ich0 is /pci@0,0/pci1509,927a@6
Nov  1 16:00:26 solaris-devx genunix: [ID 773945 kern.notice]   UltraDMA mode 6 selected
Nov  1 16:00:26 solaris-devx genunix: [ID 773945 kern.notice]   UltraDMA mode 4 selected
Nov  1 16:00:26 solaris-devx last message repeated 2 times
Nov  1 16:00:26 solaris-devx genunix: [ID 182205 kern.notice]   MultiwordDMA mode 2 selected
Nov  1 16:00:26 solaris-devx last message repeated 7 times
Nov  1 16:05:26 solaris-devx genunix: [ID 773945 kern.notice]   UltraDMA mode 6 selected
Nov  1 16:05:26 solaris-devx genunix: [ID 773945 kern.notice]   UltraDMA mode 4 selected
Nov  1 16:05:26 solaris-devx last message repeated 2 times
Nov  1 16:05:26 solaris-devx genunix: [ID 182205 kern.notice]   MultiwordDMA mode 2 selected
Nov  1 16:05:26 solaris-devx last message repeated 7 times

The main issue is I am getting 8MB/s transfers from my Hard Drives when I should be pulling between 15MB/s and 25MB/s as I do with the onboard controllers.

SECOND_IN_COMMAND.ISO
  3127193600 100%    8.00MB/s    0:06:12 (xfer#6, to-check=1/7)

There is a copy/paste from a transfer by rsync, this is not a network copy, all local drives, still this slow...

If you have any ideas let me know, it seems to be an IRQ/DMA conflict, but with the cards having no setup for IRQ and my Motherboard lacking as well, its left to the OS to force the right settings it seems...

Board seems to be giving these cards IRQ's on boot, but the OS is using IRQ 21 is not anything the BIOS assigns. Also, I have tried Ubuntu 7.10 and the box grinds to a halt when accessing drives in raid, or a single drive from a single card.