HP SW TL881 DLT Mini-Lib/1 Compaq StorageWorks TL881/TL891 Family MiniLibrary - Page 44
LED Indicators, Pushbuttons, Front Panel and Media Locks
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Operation 2-11 LED Indicators The three LED indicators on the control panel are labeled Ready (green), Alert (yellow), and Fault (red). I Ready (green) - lights when the system is ready to accept commands, either from the control panel or from the host computer via the Expansion Unit. The Ready indicator goes out when you enter Menu Mode. I Alert (yellow) - this LED has no function in the Data Unit. I Fault (red) - when this LED lights, a Fault screen appears on the display. The Fault screen is described later in this chapter. A list of Fault Symptom Codes (FSC) and Error Recovery Procedures (ERP) are shown in Chapter 5, "Troubleshooting." Pushbuttons The pushbuttons on the Data Unit control panel operate the same way as the pushbuttons on the Expansion Unit control panel. See the description of the Expansion Unit pushbuttons described earlier in this chapter. Front Panel and Media Locks To avoid accidental interruption of system operation by entering Menu Mode or removing cartridges while the host is accessing the system, the front panel and the media for each module can be electronically locked. When the front panel of the Expansion Unit is locked, you can only enter Menu Mode after entering a 4-digit code. That is, when the Default screen appears, pressing the Enter button does not invoke Menu Mode until you enter the code. The front panel of a Base Module cannot be unlocked without using the Security submenu on the Expansion Unit to unlock it. All MiniLibrary Base Module and Data Unit front panels are locked by default when connected to a Expansion Unit. Media located in any or all modules can be locked and unlocked using the Security submenu on the Expansion Unit. When media is locked, you can only remove media after unlocking the module from the Expansion Unit using the Security submenu. Procedures for locking and unlocking front panels and media are described later in this chapter.
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