Hi @jork,
to check whether the device is connected as USB 2 or 3 you need to connect to your router over SSH and issue command: lsusb -t
Following lines are showing output from my MOX. The 5000M indicates, that the bandwidth of USB 3 will be fully utilised.
root@MOX-A:~# lsusb -t
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
|__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=orion-ehci/1p, 480M
Following commands will tell you how much time is needed to write and read 1 GB of data to your USB device.
Write 1 GB of data, adjust /mnt/speedtest/tempfile.tmp according to your mount point
root@MOX-A:~# time dd if=/dev/zero of=/mnt/speedtest/tempfile.tmp bs=1M count=1024
1024+0 records in
1024+0 records out
real 0m 11.98s
user 0m 0.01s
sys 0m 3.88s
Read 1 GB of data, adjust /mnt/speedtest/tempfile.tmp according to your mount point:
root@MOX-A:~# time dd if=/mnt/speedtest/tempfile.tmp of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
real 0m 13.25s
user 0m 0.00s
sys 0m 2.91s