The block size variation did not pertain to the I/O block sizes generated by NetBench, but instead referred to the NTFS block size used when initializing the file system on the Compaq. The results shown in the paper indicate that there is a performance advantage to specifying a file system block size of 4-KB for NTFS, instead of the default 8-KB, but that the difference was very small.
^^^^ Minor typo -- as noted in the paper, the default is 32 KB.
-- Karl