Fan Controller Reset; Cause; Resolution; Fan Controller Timeout - Sun Microsystems SPARC Enterprise T5120 Installation And Service Manual

D.6.14

Fan Controller Reset

Upon software request, the bridge controller can assert a hardware reset signal to the
centerplane. This operation will not result in error messages. Software will re-
initialize all I2C devices after a controlled reset.
D.6.14.1

Cause

Inserting a boat into a chassis can result in an accidental hardware reset.
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Power circuitry could cause hardware reset of the microcontroller.
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D.6.14.2

Resolution

Reinitialize the I/O Box.
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Replace the chassis.
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D.6.15

Fan Controller Timeout

If commands are not serviced within the expected time frame (with multiple retries),
timeout errors are posted.
D.6.15.1 Cause
Hardware failures cause the fan controller to not service the command request
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buffer.
If the fan controller reinitializes after a hardware reset, command requests may
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timeout.
D.6.15.2 Resolution
Resolve I2C errors and avoid hot-plugging of boats.
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D.6.16

Bridge Controller Reset

Resets are posted for bridge controller watchdog timeouts or hardware resets. Resets
should not occur under normal operating conditions.
Appendix D Troubleshooting with ILOM Diagnostic Messages D-19