sudo hdparm -t /dev/sda1 SSD internal  570 MB in 3.01 sec=189.50 MB/sec
sudo hdparm -t /dev/sdb  Sata internal 308 MB in 3.04 sec=101.16 MB/sec
sudo hdparm -t /dev/sdc  Sata internal  90 MB in 3.13 sec= 28.74 MB/sec
sudo hdparm -t /dev/sdh1 USB2 external 104 MB in 3.06 sec= 34.04 MB/sec
sudo hdparm -t /dev/sdd1 USB3 external 244 MB in 3.01 sec= 81.09 MB/sec