root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
429916160 bytes (430 MB, 410 MiB) copied, 13 s, 33.0 MB/s

root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
1588592640 bytes (1.6 GB, 1.5 GiB) copied, 48 s, 33.1 MB/s

root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
2878341120 bytes (2.9 GB, 2.7 GiB) copied, 87 s, 33.1 MB/s

root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
7797211136 bytes (7.8 GB, 7.3 GiB) copied, 236 s, 33.0 MB/s

root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
9408872448 bytes (9.4 GB, 8.8 GiB) copied, 285 s, 33.0 MB/s

root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
9969860608 bytes (10 GB, 9.3 GiB) copied, 302 s, 33.0 MB/s

root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
10696523776 bytes (11 GB, 10 GiB) copied, 324 s, 33.0 MB/s

root@bananapir2:/home# dd if=/dev/urandom of=./BIG_UR_FILE_10GB.bin bs=1M count=10240 status=progress
10730078208 bytes (11 GB, 10 GiB) copied, 325 s, 33.0 MB/s 
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 325.242 s, 33.0 MB/s



SSD (240GB/SSDSC2KW240H6/Intel) to HD (1TB/5400Rpm/128MB/HTS541010B7E610/HST)
=============================================================================
root@bananapir2:/home# time $(dd if=./BIG_UR_FILE_10GB.bin of=/mnt/sdb3/BIG_UR_FILE_10GB.bin bs=1M; sync)
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 112.446 s, 95.5 MB/s

real    1m53.116s
user    0m0.171s
sys     1m15.104s

root@bananapir2:/home# rm /mnt/sdb3/BIG_UR_FILE_10GB.bin
root@bananapir2:/home# time $(dd if=./BIG_UR_FILE_10GB.bin of=/mnt/sdb3/BIG_UR_FILE_10GB.bin bs=2M status=progress; sync)
10726932480 bytes (11 GB, 10 GiB) copied, 109 s, 98.4 MB/s 
5120+0 records in
5120+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 109.117 s, 98.4 MB/s

real    1m49.776s
user    0m0.116s
sys     1m12.332s

HD (1TB/5400Rpm/128MB/HTS541010B7E610/HST) to SSD (240GB/SSDSC2KW240H6/Intel)
=============================================================================
root@bananapir2:/home# time $(dd if=/mnt/sdb3/BIG_UR_FILE_10GB.bin of=./BIG_UR_FILE_2_10GB.bin bs=1M; sync)
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 117.026 s, 91.8 MB/s

real    1m57.694s
user    0m0.092s
sys     1m21.515s

root@bananapir2:/home# time $(dd if=/mnt/sdb3/BIG_UR_FILE_10GB.bin of=./BIG_UR_FILE_4_10GB.bin bs=2M status=progress; sync)
10733223936 bytes (11 GB, 10 GiB) copied, 115 s, 93.3 MB/s 
5120+0 records in
5120+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 115.105 s, 93.3 MB/s

real    1m56.396s
user    0m0.123s
sys     1m19.704s