Hierarchical Storage Management at the NASA Center for Computational Sciences: From Unitree to SAM-QFS. - Ellen Salmon; Adina Tarshish; Nancy Palm; Sanjay Patel; Marty Saletta; Ed Vanderlan; Mike Rouch; Lisa Burns; Daniel C. Duffy; Robert Caine; Randall Golay; Jeff Paffel; et al. (MSST, 2004)