root@nfs:/# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/simfs      200G  156G   45G  78% /
tmpfs            52M   44K   52M   1% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           205M     0  205M   0% /run/shm
root@nfs:/# du -sh .
du: cannot access `./proc/2012/task/2012/fd/4': No such file or directory
du: cannot access `./proc/2012/task/2012/fdinfo/4': No such file or directory
du: cannot access `./proc/2012/fd/4': No such file or directory
du: cannot access `./proc/2012/fdinfo/4': No such file or directory
13G     .