HP StoreEver ESL G3 Tape Libraries - Manual (Page 17)

The 72–slot I/E station consists of two side-by-side 36–slot I/E stations that can operate as one
72–slot I/E station or can operate independently. Each 36–slot I/E station provides I/E capacity
of 36 LTO cartridges in six removable magazines.
NOTE: I/E stations are supported in all EMs, with the following exceptions in dual robot libraries:
•
The left parking module cannot contain an I/E station.
•
The last frame (also referred to as the right parking module) of a library cannot support a
72–slot I/E station.
High density expansion modules
High Density Expansion Modules (HDEMs) are storage-only modules that each contain a rotating
tower of storage magazines, allowing for a larger number of storage slots in the same footprint
as a standard expansion module. The HDEMs can only be added to the right of the control module.
NOTE: HDEMs are storage-only modules and do not contain drives. If you have a dual robot
library, HDEMs cannot be used as the left or right parking modules (the modules furthest left or
right).
HDEMs, in a dual robot library, can accommodate the following components:
•
I/E station (optional)
•
Cartridge storage
•
Redundant power supply (optional)
NOTE: HDEMs are only available in HW Rev 2 libraries.
HDEMs are only supported in libraries that were purchased after May 2013 or libraries that have
been upgraded with the Controller Board Upgrade Kit, purchased separately.
Library management module
The library management module (LMM) controls and manages library hardware and software
components. It enables both SAN-connected hosts and users who access the library using the
operator panel to configure the library, obtain system status information, and perform various
library functions. The LMM contains the management control blade (MCB), the robotics control
unit (RCU), and the library motor drive (LMD) or Library Power Control (LPC1), as shown in
Figure 5 (page 18) .
High density expansion modules 17