Samba - path too deep & TX underruns

[Gareth]

Hello,

We've got a funny setup. A freeBSD celeron 400 mhz gateway/fileserver 
with 384MB pc100 ram and 3 P4 3Ghz 512MB DDR400 PC's connecting 
to/through it.Our server does just fine, but we're having a problem with 
copying files greater than 16MB in size to the samba (v3) server. We 
get  "cannot copy file xxxx. Path is too deep." We can copy smaller 
files without any problems though. The messages log also has another 
message that appears quite often "dc0: TX underrun -- using store and 
forward mode".

What should ii do? Can ii change some config files somewhere, or is the 
situation unhelpable due to the slow speed of our server? - I read 
somewhere that store and forward occurs when then machine can't IO fast 
enough.

Any advice would be much appreciated.

Thanks,
Gareth