User's Guide

Chapter 2 Description
I/O Management Unit
Scalar i2000 Planning Guide 21
I/O Management Unit
The I/O management unit provides connectivity to a SAN fabric and the
hosts, as shown in
figure 10 on page 22. The I/O management unit
houses six FC I/O blades which provide the FC connections for the 12
Fibre Channel drives in the module. The I/O management unit can be
used to perform all tape drive and library host communication functions
in a library that is attached to a SAN.
I/O management units may be installed in the control module and
expansion modules. The I/O management unit supports the following
two blades:
• The control management blade performs unit status monitoring
including power and I/O present conditions, and internal network
switch functions connecting I/O blades with the library management
module.
• The FC I/O blade has an embedded controller providing connectivity
and value added features to enhance the performance and reliability
of tape operations. The FC blade has six auto-negotiating FC data
ports with a maximum of 4 Gbps and backplane connections. FC I/O
blades provide two host communication ports and four connection
ports to tape drives.