I noticed that some Linux file systems (including ext4) create sparse files by default in this scenario dd if=/dev/zero of=/mnt/test/16M bs=1M count=0 seek=16 (which creates a 16MB sparse file) but over cifs/smb2/smb3 this does not create a sparse file (and probably should). http://blogs.msdn.com/b/openspecification/archive/2010/11/05/notes-on-sparse-files-and-file-sharing.aspx http://prefetch.net/blog/index.php/2009/07/05/creating-sparse-files-on-linux-hosts-with-dd/ -- Thanks, Steve -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html