Specifications

2
Hardware Description
19
Front panel LEDs
ThefrontpanelLEDscanbesepara ted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 implementera
████ Steady Amber LED
████ LED off
H/S
(Hot Swap Status)
LEDb
████ 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.