EULER is a 3D hydrodynamics code that simulates high-speed fluid flow and high-rate, multi-material deformation problems. The program was developed at Los Alamos National Laboratory. The version tested was built for the Origin 2000 using MPI and had Pablo instrumentation inserted to enable tracing of the I/O activity. The test was performed on the Origin 2000 AEGIR at NCSA. The I/O hardware configuration of the machine was an EMC2 RAID Ultra SCSI, with 4 groups of 8 disks each. The stripe unit was one megabyte. The test script used a modified version of an input file distributed with the code. The modifications made allow the test to execute longer and produce more output.