Synopsizing kroot's data, and adding a third column: buffer kbytes/sec writes/sec 1k - 2k 50 - 100 25 - 100 10 10 - 20 1k - 2k 1 .06 - .09 60 - 90 The big surprise is not the shabby throughput with one byte writes, but the incredible performance with ten byte writes. This seems suspect. Peter