Ubuntu
linux-raspi package

  1. Bug #1962180
  2. Comment #22

Comment 22 for bug 1962180

Revision history for this message
Juerg Haefliger (juergh) wrote :

1) Are you sure the network is the bottleneck and not your local storage device?

2) Are the drives self-powered or are they powered over USB? If powered over USB, they might draw too much current from the Pi which could lead to all sorts of problems. Try with a powered hub.

3) Are there any messages in the kernel log (dmesg) at or before the time when the transfer rate drops?

4) Can you try to disable UAS for the two drives to see if that makes a difference? See https://forums.raspberrypi.com/viewtopic.php?f=28&t=245931.
Add 'usb-storage.quirks=174c:1153:u usb-storage.quirks=174c:55a:u' to /boot/firmware/cmdline.txt, reboot and check dmesg that UAS is disabled.