IBM SAN512B-6, Installation, Service And User Manual

Page: 127 / 286

Running diagnostic tests
Diagnostic tests are automatically run during POST to check the status of the
device. Any error messages generated during POST are sent to the error logs and
to the serial console, if connected.
Diagnostic tests can also be run manually to test and troubleshoot the hardware
and the firmware, including internal connections and circuitry, transceivers, and
port cables. However, diagnostic tests are generally intended for use by support
personnel.
Note: Error messages do not necessarily indicate that the device requires
maintenance.
Each diagnostic test can be implemented by entering the related command through
a Telnet or serial session. For a list of diagnostic tests and commands, refer to the
Fabric OS Administrator's Guide.
All diagnostic tests are run at all supported link speeds. They might temporarily
lock the transmit and receive speeds to a specific speed. Some diagnostic tests
require interconnecting the ports to each other or using loopback plugs. If ports are
interconnected, the media (cables and transceivers) at each end of the connection
must be of the same type. For example, short wavelength media must be
connected to short wavelength media, and likewise with long wavelength media
and copper media.
For more information about diagnostic tests and how to run them, refer to the
Fabric OS Administrator's Guide and the Fabric OS Command Reference. For
information about system error messages (
errShow
or
errDump
), refer to the Fabric
OS Troubleshooting and Diagnostics Guide.
Chapter 6. Monitoring the switch
103