Front Panel And Media Locks; Startup Display Messages; Power-On Self Test Screen - Compaq StorageWorks SSL2000 Series Reference Manual

4-8 Compaq StorageWorks SSL2000 Series Library Reference Guide

Front Panel and Media Locks

Startup Display Messages

Power-On Self Test Screen

A security feature is available to avoid accidental interruption of Library
operation by entering the Menu mode or removing cartridges while the host is
accessing the Library. The front panel and the media can be electronically
locked. When the front panel is locked, you can only enter the Menu mode
after entering a 4-digit code. That is, when the Default screen appears,
pressing the Enter button does not invoke the Menu mode until you enter the
code. The front panel cannot be unlocked without using the Security submenu
to unlock it.
The media can also be locked by software running on the host, using the SCSI
ALLOW/PREVENT MEDIUM REMOVAL command. The Library provides
no control panel override for this command. Usually, exiting the host software
restores media access. In the event of host failure, you can restore media
access by cycling the Library power.
Procedures for locking and unlocking front panels and media are described
later in this chapter.
The display on the control panel is capable of displaying four lines of 20
characters each, to allow the use of easy-to-understand messages. Many of
these messages and their functions are described in this chapter. Those
displays that are described in other chapters are cross-referenced here as well.
When power is first applied to the module, a series of Power-On Self Test
(POST) diagnostics are performed. During POST execution, the model
number of the module, the firmware revision, and the status or result of the test
in progress are displayed on the control panel as shown:
Compaq SSL2020TL
Firmware Level 0X.XX
Checking Hardware