On 3/2/21 9:58 PM, Roberto Ragusa wrote:
You just want the result and it is not sure what you are measuring and
in which conditions.
That's why you should try things in order:
- lsusb -t (guess you may be falling back from USB3 to USB2 for some
reason, since 40-50MB/s is typical of USB2)
- hdparm -t /dev/xxxxx to see the actual reading speed of the raw
device as configured in that moment
- then add the filesystem in the middle (caching + possible issues
with ntfs that may be fuse, who knows)
- then reach the "I'm just copying" files, where we do not know what
are you reading from and if it is already cached or not
Regards and good luck.
Hello again!
A bit of spare time and here I come again: I started with lshub -t and
am getting this:
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/11p, 480M
|__ Port 6: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
|__ Port 8: Dev 7, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 8: Dev 7, If 1, Class=Video, Driver=uvcvideo, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
Now when I plug in a hub on either of the 2 available ports there are
connected to Bus 02 Port 1 or Port 2, which states 480M. I've read this
is the standard speed for USB 2. Now I checked again the X1 carbon 3rd
gen specs and it says it has 2 x USB 3.0 (1 with AOU).
I do see a 5000M port but apparently it is for internal purposes.
So already I am confused. Would you mind explaining me?
Thank you.
Fred
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