User`s guide

EK–SMCPO–UG. A01 3–1
3
Maintenance
This chapter describes how to interpret the status of the LEDs on the pedestal and use
them as a troubleshooting aid during a pedestal malfunction. Both the pedestal LEDs
and the LEDs on the major components are covered. The chapter also describes how to
replace a Field Replaceable Unit (FRU) and how to reconfigure the SCSI bus.
3.1 Introduction
Troubleshooting the pedestal consists of monitoring the status of the external
LEDs to determine if a major component is malfunctioning. The Field Replace-
able Units (FRUs) in the pedestal are:
•
Disk drives (SBBs)
•
RAID array controller
•
Power supplies
•
Environmental Monitor Unit (EMU) circuit board
•
Uninterruptable Power Supply (UPS)
The information in this chapter is divided into the following major sections:
•
Pedestal status and power supply LEDs
•
SBB status LEDs
•
Controller LEDs
•
EMU error reporting
•
Replacing an FRU
•
Reconfiguring the UltraSCSI bus
•
Replacing the controller memory cache modules