HP Surestore 64 Planning Guide - Page 36

Fan Module, SBAR Assembly

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• A 9-pin maintenance port that provides a connection for a local terminal or dial-in connection for a remote terminal. Although the port is typically used by maintenance personnel, operations personnel use the port to configure network addresses. • An input filter and AC system harness (internal to the FRU) that provides the wiring to connect the AC power connectors to the power switch and power supplies (through the backplane). Fan Module Two fan modules, each containing three fans (six fans total), provide cooling for director FRUs, as well as redundancy for continued operation if a fan fails. The fan module can be replaced while the director is powered on and operating, provided the module is replaced within ten minutes (after which software powers off the director). An amber LED for each fan module illuminates if one or more fans fail or rotate at insufficient angular velocity. SBAR Assembly The director is delivered 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. Failover to the backup assembly is transparent to attached devices. 22 Director Description

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22
Director Description
•
A 9-pin maintenance port that provides a connection for a local terminal or dial-in
connection for a remote terminal. Although the port is typically used by maintenance
personnel, operations personnel use the port to configure network addresses.
•
An input filter and AC system harness (internal to the FRU) that provides the wiring to
connect the AC power connectors to the power switch and power supplies (through the
backplane).
Fan Module
Two fan modules, each containing three fans (six fans total), provide cooling for director
FRUs, as well as redundancy for continued operation if a fan fails.
The fan module
can be replaced while the director is powered on and operating, provided
the module is replaced within ten minutes (after which software powers off the director).
An amber LED for each fan module illuminates if one or more fans fail or rotate at
insufficient angular velocity.
SBAR Assembly
The director is delivered 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. Failover to the
backup assembly is transparent to attached devices.