2
Hardware Description
19
Front panel LEDs
The
front
panel
LEDs
can
be
separated
into
two
major
groups;
the
edge
LEDs
along
the
left
(bottom)
edge
of
the
front
panel
and
the
Base/Fabric
channel
status
LEDs.
Table 2
describes
the
status
and
activity
LEDs
along
the
left
(bottom)
edge
of
the
front
panel.
The
IPMC
uses
GPIO
pins
to
control
the
hot
swap
and
power
LEDs.
The
IPMC
supplies
default
states
for
the
LEDs
and
responds
to
sensor
readings,
GPIO
inputs,
and
IPMI
commands
from
other
entities
to
change
LED
states.
Table 2. Front Panel Edge Activity/Status LEDs
LED Designation
Indication
Meaning
HDD (Hard Disk
Drive) LED
█
█
█
█
Short Green blink
HDD being accessed
████
LED off
No HDD activity, or not installed
OOS
(Out-of-Service)
LED
████
Steady Amber LED LED color and On/Off state controlled by the
IPMC and user-defined application.
████
Steady Red LED
████
LED off
Normal operation
PWR
(Health)
LED
████
Steady Green LED
Power ON, health good
████
Steady Amber LED Power ON, health not good
████
LED off
Power OFF
APP
(Customer-defined
application) LED
████
Steady Green LED
Controlled by the IPMC, with functionality
defined by the system implementer
a
████
Steady Amber LED
████
LED off
H/S
(Hot Swap Status)
LED
b
█
█
█
█
Short Blue blink
M5, FRU deactivation request or
M6, FRU deactivation in process
████
Steady Blue LED
M1, FRU inactive; ready for hot swap
██
██
|
Long Blue blink
M2, FRU activation request
████
LED off
M0, FRU not installed, or
M3, FRU activation in process, or
M4, FRU active
a
The user application can control LED color and illumination using the Set FRU LED State IPMI
command. LED illumination can be turned on or off, the LED can be configured to blink, or the
lamp test function can be enabled. To use the command, specify the FRU ID, LED ID (which is
“1” for the OOS LED), LED function, LED on duration, and illumination color. Command usage is
described in the PICMG specification, FRU LED Control commands, section 3.2.5.6.
b
LED state and blink frequency controlled by the IPMC.
