Basic thumb rule RAID 5 , 64k stripe size, use the following. If you have larger files go further. # xfs, 5 disks, 64K stripe, units in 512-byte sectors mkfs -txfs -d sunit=$((64*2)) -d swidth=$((5*64*2)) Use for better memory alignment with Scheduler echo "16" > /proc/sys/vm/page-cluster - and also don't forget to change echo "256" > /sys/block/<disk>/queue/nr_requests - which should be twice the queue_depth. -Harsha
