User's Manual

Troubleshooting and Recovery 329
• 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, you can recover the CMC by uploading
the CMC firmware image.
NOTE: A normal CMC boot/reset takes over a minute to fully boot into its OS and be
available for login. The blue LED is enabled on the active CMC. In a redundant, two-
CMC configuration, only the top green LED is enabled on the standby CMC.
Obtain Recovery Information From the DB-9 Serial Port
If the bottom LED is amber, recovery information should be available from
the DB-9 serial port located on the front of the CMC.
To obtain recovery information:
1
Install a NULL modem cable between the CMC and a client machine.
2 Open a terminal emulator of your choice (such as HyperTerminal or
Minicom). Set up: 8 bits, no parity, no flow control, baud rate 115200.
A core memory failure will display an error message every 5 seconds.
3 Press <Enter>. If a recovery prompt appears, additional information is
available. The prompt will indicate 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 the CMC. The CMC is bad and must returned to
Dell.
• If the prompt indicates
Bad FW Images , then follow the steps in
"Recovering the Firmware Image" on page 330 to fix the problem.