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So I'm trying to safely remove this USB drive, because when I don't it does not work properly. When I go on Nautilus and try to eject it, I get this error message:

Error ejecting: eject exited with exit code 1: eject: unable to eject, last error: Invalid argument

And when I try to safely remove it via Nautilus or Disk Utility:

Error detaching: helper exited with exit code 1: Detaching device /dev/sdb
USB device: /sys/devices/pci0000:00/0000:00:12.0/usb3/3-1)
SYNCHRONIZE CACHE: FAILED: No such file or directory
(Continuing despite SYNCHRONIZE CACHE failure.)
STOP UNIT: FAILED: No such file or directory

Doing a file system check on Disk Utility returns File system is clean.. Trying to unmount it via terminal returns this:

~sudo eject /dev/sdb
eject: unable to eject, last error: Invalid argument

I've tried to unmount it on Windows (dual boot system), but I simply got an error message saying that it was unable to eject it. No programs running or anything.

Gus
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2 Answers2

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So, the problem has been solved thanks to Douggro, who helped me in the comments. I'm just reposting his answer here to close the question.

Try ls /media and see if the drive shows there. If it does, sudo umount /media/drivename – douggro

Gus
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2

To safely remove an unmounted drive, eject with sudo

sudo eject /dev/sdb
Concurrent EDA
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