HP StorageWorks SAN Director Installation Guide (A7393-90009, May 2007)

Diagnostics and troubleshooting186
Diagnostics
Diagnostic tests are automatically run during POST to check the status of the switch. 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 switch 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, see the HP StorageWorks Fabric OS
administrator guide.
All diagnostic tests are run at link speeds of both 1, 2 and 4 Gb/sec. 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, see the HP StorageWorks Fabric
OS administrator guide and the Fabric OS command reference manual. For information about
system error messages (errShow or errDump), see the Fabric OS system error message reference
manual.