Longmont, Colorado-based COPAN Systems, said today it has added a new reseller to its network. COPAN has signed on Dallas Digital Serviecs (DDS), a Texas-based reseller of enterprise storage. DDS will carry COPAN's disk-based backup systems for its Fortune 500 customer base. COPAN is backed by Austin Ventures, Globespan, Pequot Ventures, and Credit Suisse.