Compaq StorageWorks TM RAID Array 3000 Pedestal Storage Subsystem Hardware User's Manual page 61

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.
Troubleshooting the pedestal consists of monitoring the status of the external
LEDs to determine if a major component is malfunctioning. The Field
Replaceable Units (FRUs) in the pedestal are:
Disk drives (SBBs)
RAID array controller
Power supplies
Environmental Monitor Unit (EMU) circuit board
Uninterruptable Power Supply (UPS)
3
Chapter
Maintenance