In one embodiment, a data storage media comprises: a substrate comprising
at least one plastic portion, an edge lift height of less than about
8.mu., and an axial displacement peak of less than about 500.mu. under
shock or vibration excitation; and at least one data layer on said
substrate. The data layer can be at least partly read from, written to,
or a combination thereof by at least one energy field, and, when the
energy field contacts the storage media, the energy field is incident
upon the data layer before it could be incident upon the substrate. In
another embodiment, the data storage media comprises: a substrate
comprising at least one plastic portion and an axial displacement peak of
less than about 500.mu. under shock or vibration excitation, and an areal
density of about 10 Gbit/in.sup.2; and at least one data layer on the
substrate. The data layer can be at least partly read from, written to,
or a combination thereof by at least one energy field, and, when the
energy field contacts the storage media, the energy field is incident
upon the data layer before it could be incident upon the substrate.