HP EML E-series Tape Libraries - Manual (Page 14)

Tape drive expansion module
The tape drive expansion module is an 8U chassis containing 94 LTO slots (84 permanent and
10 configurable). The number of usable permanent slots depends on whether it is the bottom module
in the library because the library floor is always attached to the bottom module and the floor limits
the distance that the robot can travel. If the library floor is attached to the tape drive expansion
module, the bottom row (containing seven slots) cannot be used.
CAUTION: Never operate the library with the floor removed. The robot can be damaged.
The tape drive expansion module has three windows on the front for viewing the robotic motion
inside the library. To the right is a 10-cartridge configurable load port that holds two 5-cartridge
magazines.
On the back, the module contains one primary power supply with a slot provided for another
optional redundant power supply. Up to four Ultrium tape drives can be installed in the tape drive
expansion module. Cable management features are provided for cable routing and dressing.
Figure 5 Tape drive expansion module
2. 10-Cartridge load port 1. Viewing windows
4. Tape drives (LTO3 tape drives shown) 3. Power supplies (optional redundant power supply shown)
5. Cable management features
Card cage expansion module
The card cage expansion module is a 4U chassis that contains 48 permanent LTO slots and space
for additional interface controllers. This module must be located directly below the top 8U tape
drive expansion module. The number of usable permanent slots depends on whether it is the bottom
module in the library because the library floor is always attached to the bottom module and the
floor limits the distance that the robot can travel. If the library floor is attached to the card cage
expansion module, the last two rows (containing 16 slots) cannot be used.
CAUTION: Never operate the library with the floor removed. The robot can be damaged.
The front of the card cage expansion module has one window for viewing robotic motion inside
the library. On the back, six PCI card slots are available for additional interface controllers to
expand the library tape drive capacity. One interface controller is added for every four additional
LTO2 or LTO3 tape drives. LTO4 and later tape drives do not connect to an interface controller;
instead, they connect directly to the SAN. Two power supplies are located at the bottom of the
card cage, and two cooling fans are on the right.
14 Library overview