В smb.conf:
     socket options = TCP_NODELAY IPTOS_LOWDELAY SO_SNDBUF=4096 SO_RCVBUF=4096
     read size = 32768
     read raw = no
     read prediction = true
     write raw = yes
     wide links = no
     oplocks = yes
     max xmit = 65535
     dead time = 15
     getwd cache = yes
     lpq cache = 30
     level2 oplocks = true
Linux:
    echo "100 1000 128 128 500 6000 6000 1884 2" >/proc/sys/vm/bdflush
FreeBSD:
   /sbin/sysctl -w net.local.stream.recvspace=65535
   /sbin/sysctl -w net.local.stream.sendspace=65535
   /sbin/sysctl -w net.inet.tcp.sendspace=65535
   /sbin/sysctl -w net.inet.tcp.recvspace=65535