User`s manual

Preliminary
Power-On-Self-Test (POST)
SANbox-8 Fibre Channel Switch
Installer’s/User’s Manual 59008-03 Rev. A Diagnostics/Troubleshooting 3-5
PROM Checksum Failure (1 Blink)
The Switch is not operable. This is a checksum test of the PROM designed to verify
the integrity of the PROM data. A failure indicates the PROM data is corrupted
and blinks the Heartbeat LED once between three-second pauses. No port Logged-
in LEDs blink.
RAM Failure (2 Blinks)
The Switch is not operable. This is a test designed to verify the data and address
busses to the SRAM as well as the SRAM integrity. A failure indicates that either
the data bus, address bus, or SRAM is failing and blinks the Heartbeat LED twice
between three-second pauses. No port Logged-in LEDs blink.
Flash Checksum Failure/Switch Management Port (Ethernet) Tests Good (3 Blinks)
The Switch is not operable. The Flash checksum test verifies the integrity of the Flash
data. If the Flash data is corrupt, the POST next checks the Switch Management
port to find out if it is functional. It does this because the Switch Management port
is the load path for loading new Flash data. If the Switch Management port tests
good, the Switch blinks the Heartbeat LED three times between three-second
pauses. No port Logged-in LEDs blink. This means that you may load new Flash
control code via the Switch Management port. Refer to the Switch Management
manual for a description of how to load new Flash code.
Flash Checksum Failure/ Switch Management port (Ethernet) Failure (4 Blinks)
The Switch is not operable. The Flash checksum test verifies the integrity of the Flash
data. If the Flash data is corrupt the POST next checks the Switch Management
port to find out if it is functional. It does this because the Switch Management port
is the load path for loading new Flash data. If the Switch Management port tests
bad, the Switch blinks the Heartbeat LED four times between three-second pauses.
No port Logged-in LEDs blink. This means that the Flash control code is corrupt
and the Switch Management port may not operate well enough to load new Flash
code.
Force PROM Mode in Effect (5 Blinks)
This is an alarm. This indicates that the processor is reading the default configura-
tion from PROM instead of from Flash memory. This is due to the Test Mode
Switch being in the Force PROM position. You should never see this error in the
field as long as the Test Mode switch is in the proper position. The Heartbeat LED
will blink five times between three-second pauses.