A couple of days ago reference was made to iozone as a tool for measuring disk I/O on Linux systems. I have ported this to S/390 (32 & 64 bit): it had some endian-issues when creating Excel-readable output. The author has rolled them into the base and the latest tar-ball appearing on http://www.iozone.org/ should contain them. Look for level 3.190 in the next 24 hours or so. I've done some testing on it but haven't exercised all options.
