Comment # 7 on bug 1044864 from Yasuhiko Kamata

As an another solution, "udiskie" can be used for this purpose.

This app can create a system tray icon in KDE3 and can mount/unmount/eject
drives.
Furthermore, this app does not require root privilege,
because this app uses "udisks2" for mounting/unmounting/ejecting.
("kdebase3-workspace" requires "udisks2", so all users using KDE3 workspace
 can use "udisks2" and "udiskie").

After installing "udiskie", running "udiskie --tray" can show tray icon.
If you want to mount/unmount/eject, click this tray icon and select one of menu
items.

If you want to create desktop icon (for starting "udiskie"), you can create
"~/Desktop/udiskie.desktop" with the following contents:

[Desktop Entry]
Type=Application
Exec=/usr/bin/udiskie --tray