[CentOS] CentOS5 and samba

From: "lhecking at users.sourceforge.net" <lhecking at users.sourceforge.net>
> The symptoms are: read access is extremely slow, write access 
> seems to work in principle (e.g. creating a zeros-sized file on 
> a share), but writing even small files (100k) to the share eventually 
> times out with "out of memory or disk space" errors. 
> These shares are home directories NFS-mounted on the samba s
> erver. Shares of local disks work fine as expected.

Just in case, what's your nic MTU...?
Maybe read http://serverfault.com/questions/68330/samba-sharing-an-nfs-mount-point

JD