Sun Microsystems Netra CT 410, Service Manual

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Appendix C Error Messages C-9
Message
scsb#0: Successfully Upgraded to Full Hotswap Mode
Cause
Full hot-swap was enabled on the system.
Action
No action is necessary.
C.3 Anticipated Hardware Failure
C.3.1 Transient Interrupts
Message
Interrupt Level 4--Not serviced
Cause
Such a message occurring intermittently is always a result of the underlying
hardware doing something unpredictable.
Transient interrupts occur when, for example, a fan is starting to fail, and it fails long
enough to generate an interrupt but then resumes operation. By the time the fan
driver is queried, it denies the interruption because now it is functioning normally.
Action
The condition is a result of the architecture of interrupt generation and response. As
long as the generating hardware has resumed normal operation, no further action is
required.