The Second Workshop On Performance and Scalability of Storage Systems (WOPSSS) has issued its Call for Papers. The one-day workshop will be held jointly with ISC 2017 in Frankfurt, Germany. “The Workshop On Performance and Scalability of Storage Systems aims to present state-of-the-art research, innovative ideas, and experience that focus on the design and implementation of HPC storage systems in both academic and industrial worlds, with a special interest on their performance analysis. The arrival of new storage technologies and scales unseen in previous practice lead to significant loss of performance predictability. This will leave storage system designers, application developers and the storage community at large in the difficult situation of not being able to precisely detect bottlenecks, evaluate the room for improvement, or estimate the matching of applications with a given storage architecture.”