[ovirt-users] Storage Performance

Have a question in regards to storage performance. I have a gluster replica 3 volume that we are testing for performance. In my current configuration is 1 server has 16X1.2TB( 10K 2.5 Inch) drives configured in Raid 10 with a 256k stripe. My 2nd server is configured with 4X6TB (3.5 Inch Drives) configured Raid 10 with a 256k stripe. Each server is configured with 802.3 Bond (4X1GB) network links. Each server is configured with write-back on the raid controller. I am seeing a lot of network usage (solid 3 Gbps) when i perform file copies on the vm attached to that gluster volume, But i see spikes on the disk io when watching the dashboard through the cockpit interface. I spikes are up to 1.5 Gbps, but i would say the average through put is maybe 256 Mbps. Is this to be expected, or should it be a solid activity in the graphs for disk IO. Is it better to use a 256K stripe or a 512 strip on the hardware raid configuration? Eventually i plan on having the hardware match up for better performance. Thanks Bryan