Specifications

Chapter 4
Troubleshooting Resources
This chapter provides guidelines for troubleshooting the controller, cache module, and
ECB. It also describes the utilities and exercisers available to aid in troubleshooting these
components. See Chapter 5 for a list of event codes. See enclosure documentation for
information on troubleshooting its hardware, such as the power supplies, cooling fans, and
EMU.
Running the Controller Diagnostic Test
During startup, the controller automatically tests its device ports, host port, cache module,
and value-added functions. If experiencing intermittent problems with one of these
components, run the controller diagnostic test in a continuous loop, rather than restarting
the controller over and over again.
Use the following steps to run the controller diagnostic test:
1. Connect a terminal to the controller maintenance port.
2. Start the self-test with one of the following commands:
SELFTEST THIS CONTROLLER
SELFTEST OTHER_CONTROLLER
NOTE: The self-test runs until it detects an error or until the controller reset button is pressed.
If the self-test detects an error, it saves information about the error and produces an
OCP LED code for a “daemon hard error.” Restart the controller to write the error
information to the host error log, then check the log for a “built-in self-test failure”