FTP from mounted CIFS - Download never ends (continues after 100%)

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http://serverfault.com – I have the following situation: I have two servers, one sharing files over CIFS, the other shares files by FTP. The FTP-Server has the CIFS Share mounted, and FTP users can download from this mount. The Problem: When an FTP User downloads a "big" file (about 800MB) from the CIFS mount the download never stops and continues after reaching 100%. If the big file is located locally (not mounted via CIFS) everything works fine. Small files (1MB) work fine. Does anyone know how to fix this problem? CIFS is mounted with fstab: // /mnt/share cifs _netdev,noperm,auto, (HowTos)