Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide

1–6 Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide
Fibre Channel Gigabit Switch
The Fibre Channel gigabit switch, shown in Figure 1–3, is used to connect the controllers
to the hosts and to link the initiator and target sites together. The ports hold short- or
long-wave Gigabit Interface Converters, which are described in the next section. See the
StorageWorks Fibre Channel Storage Switch User’s Guide for an in-depth look at the
features and functions of the Fibre Channel gigabit switch.
Figure 1–3. Fibre channel gigabit switch
Gigabit Interface Converters (GBIC)
GBICs are the converters that are inserted into the ports of the Fibre Channel switch and
serve as the interface between the fiber optic cables and the switch. Short-wave GBICs are
used with a 50 micron multi-mode fiber optic cable (SC-terminated) to connect the
components at the initiator and target sites (host-to-switch; controller-to-switch). The
maximum distance that short-wave GBICs support is 500 meters. Long-wave GBICs are
used with 9 micron single-mode fiber optic cables (SC-terminated) to link the initiator and
target sites together. Long-wave GBICs connect switches that are up to 10 kilometers
apart. See the StorageWorks Fibre Channel Storage Switch User’s Guide to learn more
about GBICs.
Power Distribution Unit (PDU)
The PDU is another component that is included with the ESA12000 cabinet and is used to
distribute power to the BA370s and switches. A second PDU can be ordered to support a
fully-redundant power configuration. See the RA8000 and ESA12000 Storage Subsystems
User’s Guide for more detailed information.
CXO7085A