Chapter 1: Introduction
If the failed
Controller A
restarts and successfully returns to service, it
will become the secondary controller.
If
Controller A
is replaced and then the subsystem is rebooted,
Controller B
will return the Primary role to
Controller A
, the
controller located in the upper slot.
BBUs:
All F16F models come with either one (1) or two (2) BBUs.
BBUs are designed to sustain cached data during a power outage to
prevent data loss. These BBUs are independent from controllers and
separately hot-swappable. (See
Section 1.2.4.
)
PSUs:
The hot-swappable PSUs provide power to the subsystem. A
power switch is provided with each PSU to turn the system on and off.
(See
Section 1.2.5.
)
Cooling modules:
The redundant cooling modules provide ventilation
airflow across the subsystem. (See
Section 1.2.6.
)
DIP Switches:
The subsystem DIP switches control some of the
system configuration options.
Host connection modules:
Each host connection module contains two
(2) FC ports for host connection. (See
Section 1.2.7.
)
Expansion modules:
Each expansion module provides extensions
from a dual-loop configuration and two (2) additional channels (CH4 &
CH5 – 6-channel models) for host or drive connections. (See
Section
1.2.8.
)
1.1.3.7 Backplane Board
An integrated backplane board separates the front and rear sections of the
F16F subsystem. This PCB board provides logic level signals and low
voltage power paths. Thermal sensors and I
2
C devices are onboard to detect
system temperature and PSU/cooling module operating statuses. This board
contains no user-serviceable components.
WARNING!
The backplane board is not a user-serviceable item. Avoid contact with the
backplane board for possible shorts with voltage traces can cause
hazardous results.
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