On Tue, 2004-01-20 at 05:15, Gregory Gulik wrote: > F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD > 1 D 0 11952 1 0 80 2 - 1341 wait_o ? 00:00:00 gtar This process is blocked waiting for I/O, so I can't be killed until the I/O request is completed. This is something usual for processes which use NFS: when the remote NFS dies or stops responding, the client program stays at D and can't be killed.