Ubuntu – Ejecting a USB 3.0 drive connected to USB 3.0 port reconnects immediately

14.04ejectusb

I have an external HDD with a USB 3.0 connection. When I connect it to the USB 3.0 port on my laptop, it works fine but when I eject it, it gets remounted immediately.

This doesn't happen when I connect the same drive to a USB 2.0 port.

At the moment I'm unmounting (clicking the "eject" button in Nautilus) instead.

Is there a way to avoid this issue?

Best Answer

I've found 3 workarounds:

attached to bug https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/792085 there is an advice to uncheck "Mount removable drives when hot-plugged" setting: https://launchpadlibrarian.net/191200111/Thunar_uncheck_setting.png
edit the BIOS settings: a) set xHCI mode to manual and b) disable the "xHCI pre-boot driver". It seems to solve the problem and supposedly leaves the USB 3.0 mode switched on. I've applied this method but, sorry, haven't tested it thoroughly yet.
a hard and violent workaround: just disable USB 3.0 mode in the BIOS settings - disable the xHCI interface, which is essential to USB 3.0. It helps... Although slows down the USB...

Related Solutions

Ubuntu – USB 3.0 port not detecting USB modem

Check out the /etc/usb_modeswitch.conf file.

At the end you will find:

# Optional increase of "delay_use" for the usb-storage driver; there are hints
# that a recent kernel default change to 1 sec. may lead to problems, particu-
# larly with USB 3.0 ports. Set this to at least 3 (seconds) in that case.
# Does nothing if the current system value is same or higher

SetStorageDelay=3

Try 3 or 5 seconds here.

Ubuntu – USB 3.0 hard drives don’t spin down when “safely removed” from Nautilus

AFAIK, "Remove safely" just unmounts the device, and removes it from udev. It doesn't send any command to the drive to shut down.

On the contrary, udisks --detatch does so: (udisks manpage)

--detach device_file [--detach-options options]
       Detaches (e.g. powering down the physical port the device is
       connected to) the device represented by device_file using a
       comma-separated list of options.

Best Answer

Related Solutions

Ubuntu – USB 3.0 port not detecting USB modem

Ubuntu – USB 3.0 hard drives don’t spin down when “safely removed” from Nautilus

Related Question