HP StoreEver ESL G3 Tape Libraries - Manual (Page 18)

Figure 5 Library management module boards
1. Management control blade
2. Robotics control unit
3. Library motor drive (LMD) or Library power control (LPC1)
Management control blade (MCB)
The MCB is the primary point of intelligent management in the library. The MCB stores firmware
and configuration data for itself as well as most other intelligent components in the library. It also
contains the LMC, which enables local or remote users or hosts to operate, configure, and monitor
the library. The MCB collects status information on other components in the library and issues
notifications when problems occur.
The MCB Version 2 also has two Ethernet ports, allowing the library to be on two different networks.
This provides both additional redundancy as well as greater configuration flexibility.
Robotics control unit (RCU)
The RCU provides robotics intelligence that controls accessor movements and functions, including
picker, pivot, and reach actions.
Library motor drive (LMD) or library power control (LPC1)
The LMD/LPC1 monitors wiring, fuses, and relays within the library. It regulates power levels and
performs other power-related functions, such as disabling robotics when a library door opens.
I/O Management units
The I/O management unit supports the control management blade (CMB) and the Ethernet Expansion
Blade (EEB).
18 Library overview