Hi, I'm using Sles 8.2beta9 for some testing and have come accross a performance issue with a SATA card. This is in a dual opteron system using the Rioworks HDAMA motherboard. I added a 3ware 8506-4LP SATA raid controller card with 2 drives attached to it. I'm seeing slow performance copying large files when I use the controller to build a raid-0 array. Copying a 5GB file takes about 6 minutes. I deleted the array from the controller and left the 2 drives to be regocnized by the OS. I then built a raid-0 array using 'mdadm'. I can now copy the same 5GB file in about 95 seconds. This is on a fresh reboot so I know the file isn't cached. My first question is, does anyone else have this card? and if so are they seeing any performance issues in their opteron system? Any idea if I should I go to 3ware for opteron linux support? Or is the driver an open source project? Last question isnt amd_64 specific but if anyone knows the answer I would appreciate it. Will I take a noticable performance hit using raid-0 in the OS as opposed to the controller card? (Assuming they improve performance on the card.) Mark