Artesyn ATCA-7368 Installation and Use (June 2014) - Manual (Page 75)

BIOS
ATCA-7368 Installation and Use (6806800M12D) 75
4.6 LED behavior during POST
After power up/reset and while BIOS runs the LEDs are used to signalize the power up/ BIOS
phases. The state of LEDs is defined so that in case of a hang the LEDs clearly indicate in which
boot up phase the hang occurred. In general, to indicate that the POST is in progress, the BIOS
toggles the user LED for every POST task it executes. After the POST has been completed, the
BIOS switches off the LEDs. The LEDs marked with B1/U1,B2/U2 and U3 will be used for this
purpose.
From the OS/BBS_application_sw layer, when the blade successfully boots up in to PNE Linux,
the BBS application will:
1. Switch the OOS LED off
2. Switch the IS LED on
3. Switch the ATN LED off
When the blade is shutting down gracefully from PNE Linux OS, the BBS application will:
1. Switch the OOS LED on
2. Switch the IS LED off
3. Switch the ATNLED off
4.7 LED Usage
The BIOS uses LEDs U1, U2 and U3 on the front panel to indicate activity of startup progress. In
boot loader phase (PEI phase), U1 and U2 glow red, U3 is glowing alternately red, green and
orange.
In the main initialization phase (DXE phase), only U3 is glowing alternately red, green and
orange. U1 and U2 are set to the default value: base Ethernet interface link and activity LEDs.
Short before leaving BIOS and staring an operating system, LED U3 is set to green.
4.8 RTM SAS Controller
The BIOS extension firmware supports RAID 0 and RAID 1.