mseas-data2(~)% ./run_dd_test.sh 
Running dd test, trial 0
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 249.176 s, 17.2 MB/s
Running dd test, trial 1
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 249.788 s, 17.2 MB/s
Running dd test, trial 2
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 251.964 s, 17.0 MB/s
Running dd test, trial 3
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 277.36 s, 15.5 MB/s
Running dd test, trial 4
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 259.39 s, 16.6 MB/s
Running dd test, trial 5
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 249.425 s, 17.2 MB/s
Running dd test, trial 6
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 249.777 s, 17.2 MB/s
Running dd test, trial 7
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 247.227 s, 17.4 MB/s
Running dd test, trial 8
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 250.49 s, 17.1 MB/s
Running dd test, trial 9
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 246.866 s, 17.4 MB/s
Running dd test, trial 10
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 249.403 s, 17.2 MB/s
Running dd test, trial 11
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 246.401 s, 17.4 MB/s

Mean (excl. min, max): 17.15 MB/s