5.4 Note about the LED’sAll LEDs are updated during Power Up and Reset sequences. Upon power up or software Reset, theloader will illuminate all LEDs as soon as POST allows. This will help the User to verify if all LEDs arefunctional. When initialization starts, all LEDs will be extinguished and the Ready/Activity LED willflash at a reasonable rate of approximately 1-second per cycle, 50% duty cycle. When the mechanicalinitialization is complete, the Ready/Activity LED will stop flashing and be constantly illuminated.If a loader failure occurs, the Ready/Activity LED will be turned off and the Error LED will beilluminated. The Op Panel will also display an appropriate error code to help identify the failure.The following are additional operational details of LEDs. The “Ready/Activity” LED will be lit any time the unit is powered on and functional (i.e.passed power-on self-test). The Ready/Activity LED will blink whenever there is tapelibrary or drive activity. This LED will also blink when the unit is Offline. The "Clean" LED will only be lit when a cleaning REQUIRED has been issued by thedrive. The LED will be turned off again after a successful drive cleaning operation. The "Media Attention" LED will indicate that there is a piece of media which isbad/marginal, or invalid. The LED will be cleared when all marginal and invalidcartridges have been exported from the tape library. The "Error" LED will be lit when there is an unrecoverable (i.e. hard) drive or tape libraryfailure. This will happen at the same time the hard error message is displayed on thescreen and the LED will remain lit until the error state is resolved.5.5 Input ModesThere are several modes to enter values in the different menu items. These values are selectablepredefined values, toggle values (e.g. On/Off) and numerical values like network addresses.5.5.1 Selectable predefined valuesAfter navigating to the menu item the various predefined values can be selected with the NEXT andPREVIOUS button. As soon as the display shows the correct value it may be confirmed by pressingthe “ENTER” button.5.5.2 Toggle valuesToggle values are used to switch between two different states like On and Off. After navigating to themenu item the display shows the actual state. Pressing the ENTER button will switch to the possiblenew state. Pressing ENTER a second time will take over this new state.