McDATA® 4Gb SAN Switch for HP p-Class BladeSystem Installation Guide (AA-RW1XC-TE, November 2006)

38 Diagnostics and troubleshooting
Power-on Self Test diagnostics
The switch performs a series of tests as part of its power-on procedure. The POST diagnostic program
performs the following tests:
• Checksum tests on the boot firmware in Programmable Read Only Memory (PROM) and the switch
firmware in flash memory
• Internal data loopback test on all ports
• Access and integrity test on the Application Specific Integrated Circuit (ASIC)
During the POST, the switch logs any errors encountered. Some POST errors are critical, others are not. The
switch uses the Heartbeat LED and the Logged-in LED to indicate switch and port status. A critical error
disables the switch so that it will not operate. A non-critical error allows the switch to operate, but disables
the ports that have errors. Whether the problem is critical or not, contact your authorized maintenance
provider.
If there are no errors, the Heartbeat LED blinks at a steady rate of once per second. If a critical error
occurs, the Heartbeat LED will show an error blink pattern and the System Fault LED will be illuminated. If
there are non-critical errors, the switch disables the failed ports and flashes the associated Logged-in LEDs.
See ”Heartbeat LED blink patterns” on page 38 for more information about Heartbeat LED blink patterns.
Heartbeat LED blink patterns
The Heartbeat LED indicates the operational status of the switch. When the POST completes with no errors,
the Heartbeat LED blinks at steady rate of once per second. When the switch is in maintenance mode, the
Heartbeat LED is illuminated continuously. (For more information about maintenance mode, see
”Recovering a switch using maintenance mode” on page 43.) All other blink patterns indicate critical
errors. In addition to producing a Heartbeat error blink patterns, a critical error also illuminates the System
Fault LED.
The Heartbeat LED shows an error blink pattern for the following conditions:
• 2 blinks - Internal firmware failure blink pattern, page 38
• 3 blinks - System error blink pattern, page 38
• 4 blinks - Configuration file system error blink pattern, page 39
• 5 blinks - Over temperature blink pattern, page 40
Internal firmware failure blink pattern
An internal firmware failure blink pattern is 2 blinks followed by a two second pause. The 2-blink error
pattern indicates that the firmware has failed, and that the switch must be reset. Momentarily press and
release the Maintenance button to reset the switch. Gather logging data and call support before resetting
the switch.
System error blink pattern
A system error blink pattern is 3 blinks followed by a two second pause. The 3-blink error pattern indicates
that a POST failure or a system error has left the switch inoperable. If a system error has occurred, contact
your authorized maintenance provider. Momentarily press and release the Maintenance button to reset the
switch.
2 seconds
2 seconds