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  http://forums.2cpu.com/archive/index.php/t-78329.html 
  

  RAID10 setup
  Select the first two drives by highlighting the appropriate drive then pressing the space bar for each one.
  Press Enter to create span number one.
  Select the next two drives and press Enter to create span number two.
  Press Enter one more time to end the array. A configuration screen displays showing a RAID 1 with SPANNING set to YES. This indicates a RAID 10 array and not RAID 1.
  They even have to make an excuse as to why it reports raid1 when it is supposed to be 10.
  

  
  http://forums.2cpu.com/showthread.php?t=67387&page=6
  

  1) So...after much frustrating tweaking and benching, I finally got results that make sense! Turns out, I installed my hard drives exactly as the Maxtor manual said to install: with an active terminator at the end of the scsi cable. The manual explicitly states that the drives do not support onboard termination, which is why I put an Active Terminator at the end, just like the manual states.
  
  Well, after looking and looking around on the net for some high quality scsi cables, I came across a scsi cable package that included scsi cables and an active terminator that looked different from the one I was using. I decided to pull the terminator I was using and run to the store and get the one that looked similar to the pic. However, before running out the door, I remembered seeing the Enable Termination setting in Ctrl-M, and decided to put one of my hard drives at the end of the scsi cable where the Active Terminator used to be.
  
  I booted it up, and sure enough the 320-2E still saw both of my hdd's! I made a RAID-0 array, transferred the disc image back onto the array using Acronis True Image, and now they're benching at about 150 mb/s instead of the 40 mb/s!!!!!!! So, YES....320-2E DOES work on SLI....at least my M2N-32SLI Deluxe, and here's the screenshot:
  
  
  2) SCSI requires both ends of the chain to be terminated. If you're using only internal drives, that means the SCSI card has to have termination enabled, and there should also be an active terminator on the end of the cable. I would recommend replacing the terminator you have on the cable, but leaving termination enabled on the card. If you see the speed drop again, that's a pretty good indication that your terminator may be defective or more likely the wrong type (single-ended SCSI vs. U320). Not using a terminator at the end of the cable may work, but is likely to cause intermittent errors that will be a pain to figure out.
  
  Perhaps your card had termination disabled. That would be the correct setting if you were using both internal and external devices on the same channel. In that setup you would need an active terminator at the end of the internal and external cables.
  

  
  

  http://forums.vr-zone.com/showthread.php?t=86367
  
  
  
  128MB vs 512MB Buffer Round-Up
  ONLY the 512MB Micron -5G DDR266 CL2-2-2-5 ECC can be detected, the 1GB one is not supported on this MegaRAID Card.
  
  Benchmark Result
  512MB Buffer has advantages over 128MB Buffer in the following aspects:
  Random Read， Random Write，and Sequential Write　
  For about 20 percents performance lead.

  
  1.Comparing the performance of Single Channel or Inter-Dual Channel, The fastest performance was obtained by Single Channel only whilst the other channel is empty.
  2.1x RAID 0 ~ 6x RAID 0 are using ST336753LC OR ST336753LW Hard Disks, 7x RAID 0 and above added Fujitsu MAS3367NC.
  3.WRITE THRU can increase the Reading Speed but at the same time the writing speed will be lower, This setting is only suitable for database server.
  4.The best configuration with well-balanced performance will be WRITE BACK & READ AHEAD & CACHED I/O.