See the following SAS KB articles for tools to test I/O throughput:

• SAS KB0036262, "Tool to test I/O throughput on UNIX platforms"
• SAS KB0039548, "Tool to test I/O throughput on RHEL systems (the rhel_iotest.sh script)"
• SAS KB0039569, "Tool to test I/O throughput on Microsoft Windows platforms"

For a complete list of articles useful for troubleshooting system performance problems, see SAS KB0036235.