Digital Equipment Corporation RAID Array 3000 storage subsystem Guide de l'utilisateur Page 53

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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
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