MegaRAID Linux Optimizations

Add to /etc/rc.local before exit 0.

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echo '975' > /sys/block/sda/queue/nr_requests
echo '975' > /sys/block/sda/device/queue_depth
echo '0' > /sys/block/sda/queue/rotational
echo 'noop' > /sys/block/sda/queue/scheduler