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SBAR Assembly
The director ships with two SBAR assemblies. The active SBAR is responsible for Fibre
Channel frame transmission from any director port to any other director port. Connections
are established without software intervention. The assembly accepts a connection request
from a port, determines if a connection can be established, and establishes the connection
if the destination port is available. The assembly also stores busy, source connection, and
error status for each director port.
The backup SBAR takes over operation if the active assembly fails, and provides the
ability to maintain connectivity and data frame transmission without interruption. The
transition to the backup assembly is transparent to attached devices.
Each SBAR assembly consists of a card and steel carriage that mounts flush on the
backplane. The carriage provides protection for the back of the card, distributes cooling
airflow, and assists in aligning the assembly during installation. The rear of the carriage
contains a green LED that lights if the assembly is operational and active, and an amber
LED that lights if the assembly fails. The amber LED blinks if FRU beaconing is enabled.
Power Module Assembly
The power module assembly is located at the bottom rear of the director. The module
provides the following.
Two single-phase AC power connectors. Each connector is input rated at 85 to 264
VAC.
A power switch (circuit breaker) that controls AC power distribution to both power
supplies. The breaker is set manually, or is automatically tripped by internal software if
thermal sensors indicate the director has overheated.
A 9-pin maintenance port that provides a connection for a local terminal or dial-in
connection for a remote terminal.
Overview
1–7
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