I’m not sure what I’m doing wrong but DD is not providing the speed when I run the commands.
root@GL-AXT1800:/tmp/mountd/disk2_part1# sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
1024+0 records in
1024+0 records out
root@GL-AXT1800:/tmp/mountd/disk2_part1# dd if=tempfile of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
USB drive is Kingston DT microDuo 32GB USB 3.0 (slow writes)
Hard drive is Seagate Momentus 7200.4 500GB spinning hard drive in USB 3.0 enclosure
SSD drive is Intel SSD 330 Series180GB in USB 3.0 enclosure
Speeds were calculated by timing the copying of a 3GB file for SD/USB drives and a 5GB file for Hard drive/SSD
Strange that Hard drive Read is only 32.5MB/sec, but I ran the test twice.
Router USB 3.0 port has enough power for the spinning hard drive.
SSD performance is impressive!
EDIT:
For comparison, here are Disk Read/Write speeds when plugged directly into with Windows 10 PC USB 3.0 port: