HP MSL6000 Series - Manual (Page 27)

MSL6000 series tape library user guide 27
Figure 9 Library front panel
Multi Unit Library Systems
MSL Series tape libraries can be stacked in a scalable combination with additional two-drive and
four-drive models to form a multi unit library configuration. Through use of a rear-mounted
Pass-Through Mechanism (PTM), all libraries in a multi unit library configuration can operate
together as a single virtual library system. Stacked libraries are interconnected through their rear
panel Ethernet connections to a supplied LAN hub that mounts to the rack enclosure. The LAN hub
also provides a wide area network (WAN) connector when libraries are combined in their
maximum stacked height.
A maximum of four four-drive models or eight two-drive models can be connected together in this
manner. Any combination of libraries, not exceeding 40 Units (40U) in total stacked height, can
also be used. A multi unit library configuration appears as a single library to the host computer
system and application software. For multi unit applications, the top library becomes the master unit
and all other libraries are slave units.
WARNING! The PTM continues to function each time a slave library is physically removed from the
rack enclosure configuration during normal library operation. Refer to the HP StorageWorks MSL
Series Pass-Through Mechanism Reference Guide for detailed installation, configuration, and
operation information
.
The library robotics can pick and place tape cartridges into a movable elevator that encompasses
the full length of the PTM. In this manner, individual tapes can be passed up or down between the
libraries contained in the multi unit library configuration under the master library control. Robotics
1 Viewing Window
2 GUI Touch Screen
3 Library Status LED
2
3
1