Earlier this week I put a 4-channel 3ware card into a new SuSE box. I set it up as Raid 1+0 with default stripe size. Then I performed the following on 3 different setups: sync; date; dd if=/dev/zero of=target bs=64k count=100000; sync; date There was no other activity on the machines and all had the same motherboard and disk drives (7200rpm ATAs). I tried Pure ATA 3-ware Raid 1 3-ware Raid 1+0 To my great surprise I found pure ATA to be the fastest and Raid 1+0 to be the slowest by far. (30% slower than Raid 1) In particular using iostat -d 10 during the above test I was only getting 15,000 blocks per second being written out. I was expecting 50,000 blocks per second. Is there anyone useing 3ware with Raid 1+0 that is getting higher throughput than 15,000? If so, can you give details of your config. Thanks Greg