Greetings, I am brand new to this list, so forgive me if this thread has already been dealt with (although, nothing in the recent archives caught my eye). I would be happy to post a summary of the responses I (hopefully) get. I am trying to identify the "performance" parameters for the smb.conf file and after perusing various docs (including Speed.txt), have come to the conclusion that the one that makes the most significant difference to some of our applications - to the tune of 4x faster, is: fake oplocks = yes I am doing some performance tests on an isolated network (1 NT client and 1 HP-UX server), so don't have a "real-world" environment to test in. I am just wondering whether any of you have any experience with this parameter - good or bad. What are the conditions under which one can safely use this option without fear of data corruption? I also suspect that the socket options, and read/write buffer sizes would help some. But given my surfacial knowledge on the subject of sockets, I have not ventured beyond what was suggested in Speed.txt: socket options = TCP_NODELAY If you have had any performance miracles on any of the following UNIX servers with NT 4.0 as a client and are willing to share them with me, I would be terribly grateful! Solaris 2.x HP-UX 10.20 AIX 4.x Digital UNIX 4.x IRIX 6.x Thanks a mega-bunch! Sharad Koppikar skoppikar@esri.com