HP StorageWorks MSL Library Extender user guide (AQ746-96005, September 2009)

Determining the master and lower Library
The Library Extender is installed with two HP StorageWorks MSL Tape Libraries to combine the
cartridge and tape drive slots into a single extended library, as shown in the example in Figure
10, page 29.
Figure 10 Library Extender installed with two MSL4048 Tape Libraries
.
The upper Library controls the extended library and is called the master Library. The extended library
uses the master Library OCP, USB port, and Ethernet connection.
The lower Library is operated by the master Library. Its OCP, USB port, and Ethernet connection are
not used in the extended library configuration.
The upper Library must be an MSL4048 or MSL8096. The lower Library can be an MSL2024 or
MSL4048.
LowerMaster (upper)
MSL2024 or MSL4048MSL4048 or MSL8096
Saving the Library configurations
When the extended Library is configured, many of the individual Library configuration settings are
not retained. If you might ever want to recover their individual configurations, for example to separate
the Libraries in the future, save the Library configuration for each Library to a file. See the HP
StorageWorks MSL2024, MSL4048, and MSL8096 user and service guide for instructions on saving
the Library configuration.
Upgrading the Library firmware
Each Library must have a firmware version that supports the Library Extender, and the firmware versions
for the two Libraries must be compatible with each other for the extended library to operate.
HP StorageWorks MSL Library Extender user guide 29