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Preliminary
Power-On-Self-Test (POST)
SANbox-16HA Fibre Channel Switch
Installer’s/User’s Manual 59005-03 Rev. A Diagnostics/Troubleshooting 3-7
When POST is complete and errors are encountered, the Switch uses the Heartbeat
LED to blink an error code which describes the first fatal error encountered. These
error codes are described next in this section. The Switch then reads its error log
and if it has encountered non-fatal errors that affect one or more ports (but the
remaining ports are operable) it will disable the bad ports and blink the Logged-in
LED of the affected port or ports to indicate which ports are down. If the error is
non-fatal but does not affect a single port or group of ports, only the Heartbeat
LED blinks an error code. In all cases, the Switch displays the POST error indica-
tions until you power it down.
For example:
• If the POST encounters a PROM Checksum error, the entire Switch is
inoperable. The Heartbeat LED will blink the error code for the fatal PROM
Checksum error. The entire Switch is down and no port Logged-in LEDs are
lit because the problem does not affect an individual port or ports.
• If the POST encounters a Bus error, the Switch may operate in a degraded
mode because it has multiple Buses. It can operate with one or more of them
in operation but some normal processing functions such as in-order delivery
may be adversely affected. The Heartbeat will blink the error code for the
non-fatal Bus error. The Switch may operate (a little slower) and no port
Logged-in LEDs are lit because the problem does not affect the ports.
• If the POST encounters a Port error, the Switch may operate with the remain-
ing Ports. The Heartbeat blinks an error code for the non-fatal Port error. The
Switch disables the failing port or ports and blinks their Logged-in LEDs.
The POST diagnostic program performs the following basic tests:
• checksum tests on the Boot firmware located in a PROM and the main
Switch firmware located in FLASH memory
• functional hardware tests on internal Switch memory
• various read/write register and loopback data-path tests on the Switch logic
• Frame Bus and Auto Route logic tests
NOTE:
In the following POST error descriptions you will note that some errors result in a
Switch that is operable, but in a degraded way (non-fatal errors), other errors result
in a Switch that is not operable (fatal errors).Whether the problem is fatal or non-
fatal, please contact QLogic Customer Support or your authorized maintenance
provider. If the problem is non-fatal, you should be able to run in a degraded mode
until the problem is fixed.