The benchmark is the SPECsfs2008 CIFS file access benchmark. There is a similar benchmark for NFS which is much more popular in terms of supplier submissions, with BlueArc, HP, Isilon, NetApp and others reporting results. Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fwww.channelregister.co.uk%2F2010%2F01%2F27%2Femc_cifs_benchmark
IOzone lets you benchmark your filesystem performance, seeing how well record IO occurs for files of various sizes. With IOzone you can see more detailed information than the read, write, and rewrite figures that Bonnie reports. IOzone is great at detecting areas where file IO might not be performing as well as expected.
SPEC SFS 3.0 (SFS97_R1) is the latest version of the Standard Performance Evaluation Corp.'s benchmark that measures NFS file server throughput and response time. It provides a standardized method for comparing performance across different vendor platforms. This is an incremental release that based upon the design of SFS 2.0 (SFS97) and address several critical problems uncovered in that release, additional it addresses several tools issues and revisions to the run and reporting rules.