We would like to extend our warmest welcome to all attendees to the Second International Workshop on Storage Network Architecture and Parallel I/Os (SNAPI'04). In particular, we would like to thank the authors for submitting their research work to the workshop and to share their ideas and technical contributions with us and the I/O research community.Storage systems have evolved over five decades that have witnessed dramatic technological advances, changes in customer requirements, and emerging engineering challenges. In this workshop, 9 high-quality papers discuss some of the major issues facing the storage industry today, and describe a range of solutions for dealing with these issues. Ajay Gulati and Peter Varman introduce a model of disk bandwidth allocation, and provide efficient scheduling algorithms to assign the bandwidth among the concurrent applications with QoS constraints. Andre Brinkmann et al. use a similar economical motivation that inspired the original RAID in 1988 to propose to virtualize multiple RAIDs with small capacity into a large one. Jose Luis Gonzalez et al. propose an algorithm to add N disks to a RAID 5 while it continues running. Fujita Tomonori and Ogawara Masanori examine the current complicated implementations of iSCSI protocols and design a new simple one without sacrificing the efficiency. Jianqi Tang et al. provide a new solution for out-of-core applications and extend the problem size so that a cluster can solve. Peter Bleckmann et al. design an intermediate iSCSI-enabled device that deploys prefetching |