Interpreting Post And Boot Results; Post; Environmental Status And Maintenance - IBM SAN768B Installation, Service And User Manual

Interpreting POST and boot results

The SAN768B performs power on self test (POST) by default each time the system
is powered on, rebooted, or reset. The system can be rebooted using the reboot (to
reboot each CP individually), or fastBoot commands. The fastBoot command
reboots the system without running POST. If the active CP blade is rebooted, it
fails over to the standby CP blade.

POST

The system automatically performs POST each time it is powered on or reset.
To verify that POST has completed without error:
v Verify that all LEDs return to a normal state after POST completes (see
v Verify that the switch prompt displays when POST completes.
v Review the system error log using the errShow or errDump commands.
v Any errors detected during POST are written to the system log, which is
POST includes the following steps:
1. Preliminary POST diagnostics are run.
2. Operating system is initialized.
3. Hardware is initialized.
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SAN768B Installation, Service, and User Guide
Table 26. Environmental status and maintenance commands
Command
sensorShow
tempShow
psShow
fanShow
chassisShow
slotShow
errShow
errDump
Chapter 4, "Monitoring system components," on page 47).
If one or more LEDs do not return to a normal state, and this is not due to the
SAN768B being set to beacon, refer to the relevant LED table to identify and
correct the problem. For port blades, CP blades, and core switch blades, the
slotShow command can be used to check the status of the slots. For information
about turning beaconing on/off, refer to the Fabric OS Administrator's Guide.
If it does not display, POST was not successfully completed. Contact IBM for
support.
accessible through the errShow command. For information about error
messages, refer to the Fabric OS Message Reference.
Information Displayed
v Temperature readings for the port blades
v Temperature readings for the CP blades
v Status and RPM of all operational fans
v Status of all operational power supplies
v Temperature readings for the port blades
v Temperature readings for the CP blades
Status of all operational power supplies
Status and RPM of all operational fans
Serial number, time awake, and additional information about
each component
Slot occupancy
System error log. Refer to the Fabric OS Message Reference for
more information on the messages in this log.