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External Disks on Linux

How to mount and unmount USB disks, thumb drives, etc on RHEL6 Linux using KDE.

Mounting a device

Log in to the Linux computer. This only works if you are physically at the computer's console.  It does not work remotely with ssh or vnc.  Physically connect the device and you should then see a menu appear like this

List of devices to mount.

Click on the device you wish to mount.  If the filesystem has a label you will see that in this menu, if not it will just list the filesystem type like ext4 or vfat.  In this case, Volume (ext4) is the only option as the filesystem has no label.  This should open a file browser for that device.  It will also create a directory in /media with the filesystem label.  If the filesystem doesn't have a label, like in this case, it will create the directory /media/disk.

Unmounting a device

When you are ready to remove the device, exit all file browsers and any other programs accessing that device including shells in that directory.  Next, click on the Device Notifier icon in the panel (looks like a USB symbol, usually in the bottom left corner of the sceen).

Icon indicating for USB device menu.

This will bring up the menu of attached devices.  Click on the eject icon of the device you wish to unmount

List of devices to unmount.

If you get an error popup like below, it means you still have a shell in /media/<devicename> or some program accessing that device.

Error when unmount failed.

If the USB icon in your panel (usually in the bottom left corner of the sceen) briefly changes to a check mark like below, then the device has been safely unmounted and you can now physically disconnect it.

Icon indicating device was successfully unmounted.

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