Chapter 4: Subsystem Operation and Monitoring
•
Audible alarm:
A beeper comes with the RAID controller board
and will be triggered if any of a number of threatening events
occurs. These events usually jeopardize the functional integrity
of the controller board and must be heeded at all times. Events
such as a breaching of the temperature threshold will trigger the
alarm. You can use the LCD panel, the PC hyper-terminal or
SANWatch to determine the cause of the alarm and take the
appropriate corrective measures. (See
Section 4.5
)
•
I
2
C:
An I
2
C bus connects to temperature sensors and presence
detection circuits that reside on PSUs, backplane, cooling
modules, RAID controller board, and the BBU. If any problem is
detected, it will be reported in the ways stated above.
4.4 Status-indicating
LEDs
4.4.1
LCD Keypad Panel
The LCD keypad as shown below consists of five (5) buttons, three
(3) LEDs, and a 2-row x 16-character LCD screen that provides
access to the firmware-embedded utility. (See the figure below)
Press the
ENT
button for two (2) seconds on the initial screen to
enter the main menu. Press the
ESC
button to clear the current event.
Press the
UP
and
DOWN
arrow key buttons to select viewing items.
As to the
MUTE
button, it is used to silence the alarm temporarily
until the next controller event occurs. For more information on how to
use these buttons, please refer to the
Firmware Operation Manual
.
The definitions of LEDs on the panel are given in the table below.
Figure 4-5: LCD Keypad Panel
Name
Color
Status
PWR
(Power)
Blue
ON
indicates that power is supplied to
the subsystem.
4-7
