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The San Diego Supercomputer Center (SDSC) hosts what is currently the world's largest High Performance Storage System (HPSS) with over 200TB of data. The major compute facility at the center is a Teraflop-sized IBM SP called "BlueHorizon". Although both the compute facility and the HPSS utilize IBM SP computers, they are physically distinct, not sharing a switch fabric. Presently communications between the two systems are via a High Performance Gateway Node (HPGN) but when the BlueHorizon switch is upgraded in the next two months to "Colony" communications, the HPGN will no longer be able to connect the two switches.