Sun Microsystems V490 manual About Monitoring the System

In addition to the FRUs listed in TABLE 6-5, there are several minor replaceable system components—mostly cables—that cannot directly be isolated by any system diagnostic. For the most part, you determine when these components are faulty by eliminating other possibilities. These FRUs are listed in TABLE 6-6.

TABLE 6-6FRUs Not Directly Isolated by Diagnostic Tools

FRUNotes

FC-AL power cable

FC-AL signal cable

If OpenBoot Diagnostics tests indicate a disk problem, but replacing the disk does not fix the problem, you should suspect the FC-AL signal and power cables are either defective or improperly connected.

Fan Tray 0 power	If the system is powered on and the fan does not spin, or if the
cable	Power/OK LED does not come on, but the system is up and
	running, you should suspect this cable.
Power distribution	Any power issue that cannot be traced to the power supplies should
board	lead you to suspect the power distribution board. Particular
	scenarios include:
	• The system will not power on, but the power supply LEDs
	indicate DC Present
	• System is running, but RSC indicates a missing power supply
Removable media	If OpenBoot Diagnostics tests indicate a problem with the CD/DVD
bay board and cable	drive, but replacing the drive does not fix the problem, you should
assembly	suspect this assembly is either defective or improperly connected.
System control	If the system control switch and Power button appear unresponsive,
switch/power	you should suspect this cable is loose or defective.
button cable

About Monitoring the System

Sun provides two tools that can give you advance warning of difficulties and prevent future downtime. These are:

■Sun Remote System Controller (RSC)

■Sun Management Center

These monitoring tools let you specify system criteria that bear watching. For instance, you can set a threshold for system temperature and be notified if that threshold is exceeded.

Chapter 6 Diagnostic Tools 101