Changes
grep D was to broad of a query, you only care about field 10 containing D
<pre>
# ps axl | grep awk '$10 ~ /D/'
F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND
vass 13478 7.2 0.0 1732 624 pts/1 D+ 17:36 0:00 find ./