Testing DD to write file to disk.
time sh -c "dd if=/dev/zero of=ddfile1 bs=8k count=200000"
-will write 1.6G of file see output below.
time sh -c "dd if=/dev/zero of=ddfile1 bs=8k count=200000"
200000+0 records in
200000+0 records out
1638400000 bytes (1.6 GB) copied, 7.48931 s, 219 MB/s
