Hello, I have a machine that serves files to a rather needy audio application. The audio workstation uses a buffering scheme to buffer about 300k of linear audio. This means that at 44,100 samples/sec and 16bit stereo audio, 300k is about 1 sec give or take of audio. The problem I am having is that I am getting buffer underruns from the audio application. So I am assuming that I am getting unavailability for about one second via samba. When I use a test workstation and set the buffers to 30k, I get more buffer underruns. The underruns sometimes correspond to logged activity from C programs and expect scripts that I have written that support other services on the server. These processes are spawned (forked) from a mod_perl application, and are "re-parented" from httpd to init. It seemed that smbd is being overrun by these other processes, so I reniced smbd to -5. This sorta worked, but I still had some buffer underruns. I already have two NICs in the server (the audio workstations are on a private network) so I created an instance of smbd and nmbd just for the second NIC using the interfaces keyword and upgraded to samba 2.2.9 I now get less underruns, but they still occur. Today I specifically nice these forked processes to +5, but I still had a few underruns. My question is: how can I ensure that smbd is going to be able to serve files in a consistent fashion? Has anyone else had any issues with samba like this? Is it possible that this is a disk access issue? How would I diagnose this? This is on 2.4.32 SMP on a HP server with Dual 3.4 Xeons, 4G RAM, an LSI Logic U320 RAID card, and U320 10k HDs. Torleiv Ringer