In the StorCloud Challenge, applications that demand fast transfer rates and/or use multiple file systems in interesting or comparative ways compete for prizes and bragging rights. 2005 Challenge Participants Interactive Remote Visualization of Large High-Resolution Time-Varying Geophysical and Biological Datasets High-performance KEKB/Belle data analysis using Gfarm Grid file system PNNL Computational Chemistry Simulation TRI-Data Storm mpiBLAST on the GreenGene Distributed Supercomputer: Sequencing the NT Database Against the NT Database (An NT-Complete Problem) Ubiquitous Data: The TeraGrid Data CyberInfrastructure 2004 StorCloud Challenge Winners Congratulations the following winners of the 2004 StorCloud Challenge: Best Random Access Use of StorCloud The winner is Blockbuster, Lawrence Livermore National Labs This category represents a class of applications that access the storage subsystem in a random fashion as opposed to purely sequential access pattern. Random access patterns generally stress a storage subsystem far more severely than sequential access patterns. Best Use of StorCloud to Advance a Scientific Application The winner is MPQC, Sandia National Labs This category represents an application that gained significant benefit and/or growth from the use of the StorCloud storage system. Most Innovative Use of StorCloud The winner is PNNL Active Storage This category is given to the group that demonstrates a novel use of the StorCloud storage system that goes well beyond simply transferring data between the application and the storage devices in StorCloud. Highest Achieved StorCloud Bandwidth and I/Os per second The winner is ENZO, San Diego Supercomputing Center This award represents the highest bandwidth and I/O operations per second achieved between the application and the StorCloud storage subsystem used during the run.