I am unable to safely remove my Nokia E63 (connected via cable).

Error detaching: helper exited with exit code 1: Detaching device /dev/sdc
USB device: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2)
SYNCHRONIZE CACHE: FAILED: No such file or directory
(Continuing despite SYNCHRONIZE CACHE failure.)
STOP UNIT: FAILED: No such file or directory

What does this mean??

This happens with every USB storage device I connect and exchange data with. Removing it directly results in the data being written incompletely.

1 Answer 1


This is a bug and it has been filled.

The workaround is to go to terminal and execute sudo umount /dev/sdx, where sdx is where your drive is mounted. If you don't know, open an app which will show you where your drive is mounted - GParted or Disk Utility for example.

Ussualy it would be sdc if you have two hard disks, or sdb if you have only one hard disk.

  • 1
    as I understood, sudo umount /dev/sdx is the same as select 'eject' option instead of 'safely remove' May 16, 2013 at 12:18

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