User`s guide

EK–SWRA2–IG. C01 8–1
8
Troubleshooting and Service Information
This chapter contains an overview of subsystem indicators, troubleshooting subsystem
problems, and removal and replacement procedures.
8.1 Storage Pedestal Status Indicators (SBBs)
This section provides an overview of the operation of the various StorageWorks
components. Review these sections before you start troubleshooting.
The StorageWorks Building Blocks (SBBs), contained in the Expansion Storage
Pedestal, display error conditions or failures caused by the major pedestal com-
ponents. This information is displayed by the LEDs (light emitting diodes) on the
front of the power supply and drive. The following describes the signals repre-
senting these conditions or failures (states and functions) and how to interpret the
LED displays.
8.1.1 Pedestal Status
The power supply LEDs monitor both cooling and power. A drive’s LEDs indi-
cate the status of that drive.
8.1.2 Power Supply LEDs
The blowers on the rear of the pedestal provide cooling and the power supply
provides +5 V dc and +12 V dc to operate the storage devices. The power supply
LEDs indicate the state of these pedestal components.