Extremely slow USB to USB transfer

[mk01]

@Jingles

you are fine and clear - we just ask stupid questions - to be sure we really have something there and not ugly hidden misconfiguration. this really now looks as some kind of hw/kernel/rpi combo issue. you told us if you connect the hub as it is to pc (with all the disks as they are normally attached) the pc has no issues with them, right?

can you turn on debug (put "debug" into cmdline.txt), reboot, open console, sudo -i and start

Code:

while sleep 0.2; do dmesg -c -T -x; done

then from second console start even the fdisk - I wan't to see the output from kernel when there is this long time to access the device.

post to pastebin. maybe would be better to redirect the dmesg to file " > /tmp/dmesg.log" as with debug logging it could be more than one screen size of output.

thanks