How should a raid device /dev/md0, with level 0, and devices /dev/hda6, /dev/hda7 be created?

mdadm -c /dev/md0 -l 0 -n 2 /dev/hda{6,7}

mdadm -c /dev/md0 -l 0 -n 2 /dev/hda6 /dev/hda7

mdadm -C /dev/md0 -l 0 -n 2 /dev/hda6 /dev/hda7

mdadm -C /dev/md0 -L 0 -n 2 /dev/hda{6,7}

Answer:
mdadm -C /dev/md0 -l 0 -n 2 /dev/hda6 /dev/hda7

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