A self-servo writing system and method of writing servo data on a storage medium alternately writes between a first set of a plurality of wedges of servo data and a second set of a plurality of wedges of servo data to the storage medium. An extension to a wedge from the first set is written using at least one of a position reference and a timing reference from a corresponding wedge from the second set. An extension to a wedge from the second set is written using at least one of a position reference and a timing reference from a corresponding wedge from the first set.