Embodiments for facilitating data transfer between a nonvolatile storage (NVS) write cache and a pool of target storage devices are provided. Each target storage device in the pool of target storage devices is determined as one of a hard disk drive (HDD) and a solid-state drive (SSD) device, and classified...http://www.google.fr/patents/US8140811?utm_source=gb-gplus-shareBrevet US8140811 - Nonvolatile storage thresholding
