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

SAN Director installation guide 185
POST
Each time the switch is powered on or reset, the switch automatically performs POST, a system check
during which LED patterns might vary.
To verify that POST has completed without error:
• Verify that all LEDs return to a normal state after POST completes (see ”Monitoring system
components” on page 69).
• If one or more LEDs do not return to a normal state, and this is not due to the switch being set to
beacon, refer to the relevant LED table to identify and correct the problem. For port blades and
CP cards, the slotShow command can be used to check the status of the slots. For information
about turning beaconing on/off, see the HP StorageWorks Fabric OS administrator guide.
• Verify that the switch prompt displays when POST completes.
• If it does not display, POST was not successfully completed. Contact HP for support.
• Review the system error log using the errShow or errDump commands.
• Any errors detected during POST are written to the system log, which is accessible through the
errShow command. For information about error messages, see the Fabric OS system error
message reference manual.
POST includes the following steps:
1. Preliminary POST diagnostics are run.
2. Operating system is initialized.
3. Hardware is initialized.
4. Diagnostic tests are run on several functions, including circuitry, port functionality, ability to send
and receive frames, all aspects of memory, parity, statistics counters, and serialization.
Boot
In addition to POST, boot includes the following steps after POST is complete:
1. Universal port configuration is performed.
2. Links are initialized.
3. Fabric is analyzed. If any ports are connected to other switches, the switch participates in a
fabric configuration.
4. The switch obtains a domain ID and assigns port addresses.
5. Unicast routing tables are constructed.
6. Normal port operation is enabled.