Users Guide

Table 42. LED Color and Blinking Patterns (continued)
Component LED Color, Blinking Pattern Status
Enclosure Blue When the host server is identifying the enclosure
Amber Turned on or Reset, fault state
Troubleshooting Non-responsive CMC
If you cannot log in to CMC using any of the interfaces (the web interface, Telnet, SSH, remote RACADM, or serial), you
can verify the CMC functionality observing the LEDs on CMC, obtaining recovery information using the DB-9 serial port, or
recovering the CMC firmware image.
NOTE: It is not possible to log in to the standby CMC using a serial console.
Observing LEDs to Isolate the Problem
There are two LEDs on the left of the card:
● Upper-left LED — Indicates power status. If it is not ON:
○
Verify that you have AC present to at least one power supply.
○ Verify that the CMC card is seated properly. You can release or pull the ejector handle, remove the CMC, reinstall the
CMC making sure that the board is inserted all the way and the latch closes correctly.
● Lower-left LED — This LED is multi-colored. When CMC is active and running, and there are no problems, the bottom LED is
blue. If it is amber, a fault is detected. The fault may be caused by any of the following three events:
○ A core failure. In this case, the CMC board must be replaced.
○ A self-test failure. In this case, the CMC board must be replaced.
○ An image corruption. In this case, upload the CMC firmware image to recover the CMC.
NOTE:
A normal CMC boot or reset takes over a minute to fully boot into its operating system and be available for login.
The blue LED is enabled on the active CMC. In a redundant, two-CMC configuration, only the upper-right green LED is
enabled on the standby CMC.
Obtain Recovery Information from DB-9 Serial Port
If the bottom LED is amber, recovery information is available from the DB-9 serial port located on the front of CMC.
To obtain recovery information:
1. Install a NULL modem cable between a CMC system and a client system.
2. Open a terminal emulator of your choice (such as HyperTerminal or Minicom). Enter the following specification when
prompted: 8 bits, no parity, no flow control, baud rate 115200.
3. Press the <Enter> key.
If a recovery prompt appears, additional information is available. The prompt indicates the CMC slot number and failure type.
To display failure reason and syntax for a few commands, type recover, and then press <Enter>.
Sample prompts:
recover1[self test] CMC 1 self test failure
recover2[Bad FW images] CMC2 has corrupted images
● If the prompt indicates a self test failure, there are no serviceable components on CMC. CMC is bad and must be
returned to Dell.
● If the prompt indicates Bad FW Images, complete tasks in Recovering Firmware Image.
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Troubleshooting and Recovery