Luis Useche Jorge Guerra Medha Bhadkamkar Mauricio Alarcon Raju Rangaswami EXCES: External caching in energy saving storage systems. 89-100 2008 HPCA http://dx.doi.org/10.1109/HPCA.2008.4658630 conf/hpca/2008 db/conf/hpca/hpca2008.html#UsecheGBAR08