I was wondering why my USB sd-cardreader operates that slow, see this benchmark:
root@DietPi:~# hdparm -tT /dev/sda1
/dev/sda1:
Timing cached reads: 4 MB in 2.00 seconds = 2.00 MB/sec
Timing buffered disk reads: 4 MB in 3.96 seconds = 1.01 MB/sec
So I checked the USB stats:
root@DietPi:~# lsusb -t
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 12M
|__ Port 3: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 12M
|__ Port 4: Dev 4, If 0, Class=Vendor Specific Class, Driver=rt2800usb, 12M
As shown above, Port1 is in USB 1 mode (not 480M but 12M). Why? How can I change this?
Here the hub and it connected devices, everything is USB 2:
root@DietPi:~# lsusb
Bus 001 Device 004: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter
Bus 001 Device 003: ID 14cd:1212 Super Top microSD card reader (SY-T18)
Bus 001 Device 002: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4 USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
How can I change this to full speed?
- rbpi model A
- DietPi OS
