HP NonStop G-Series - Manual (Page 25)

Overview of the Tape Library
SL500 (M852x) Tape Library Installation and User’s Guide — 541531-002
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Power System
Power System
The base unit has one standard power supply. A second supply can be ordered and
installed to provide redundant power to the module components. Each supply should
be plugged into a separate circuit and powered on to provide redundant power. If one
supply fails, the second supply automatically provides power.
A single power switch on the back of the tape library is used to power on or power off
all the power supplies in the rack:
•
The ON position is 1.
•
The OFF position is 0.
Cartridge Access Port
The cartridge access port (CAP) can be used to add cartridges to the tape library, or
remove cartridges from the tape library without interrupting normal robotic operation.
The CAP in the base module has one five slot magazine; the CAP in the drive
expansion module has two five slot magazines.
Although the CAPs are not physically connected, they are logically connected. If any of
the CAPs are open, the CAP LED on the keypad will be on, alerting the operator to
take action to close the CAP. If all of the CAPs are closed, the CAP LED will be off.
You can use the keypad on the robotics unit to issue a command for the robot to
unlock the CAP.
The CAP has two settings, ALLOW and PREVENT. ALLOW is the default setting after
you power on or reset the tape library. The following table shows how these settings
affect the CAPs.
CAP Condition ALLOW PREVENT
All of the CAPs are
closed. When you press the CAP
button all of the CAPs in the
rack will open.
The library firmware turns on
the CAP LED.
When you press the CAP
button, the action is ignored
and all the CAPs remain
closed.
Any of the CAPs
are open. When you press the CAP
button, any CAP that is not
open in the rack will open. When you press the CAP
button, the action is ignored
and all of the CAPs remain
in their individual current
state of open or closed.