Chapter 4: Subsystem Operation and Monitoring
System Monitoring
Overview
4-7
and must be heeded at all times. Events such as a breaching of the
temperature threshold will trigger the alarm. If a subsystem manager is
present, he can use the LED panel, LCD keypad panel, or the PC hyper-
terminal to determine the cause of the alarm and take the appropriate
measures. (See
Section 4.5
)
•
I
2
C:
The I
2
C bus connects to sensors or detection circuits that reside on
PSUs, backplane, cooling modules, and RAID controller board. (See
Section 4.6
)
Subsystem monitoring is a necessary part of subsystem management. If
disruptive events are detected and reported, the subsystem managers must
take appropriate actions to rectify the problem. Failure to act in a properly
specified manner to a system event (like overheating) can cause severe and
permanent damage to the subsystem.