Array Controller Status; I/O Module Status; Enclosure Configuration Information - Compaq RA8000 User Manual

1.3.2.2 Array Controller Status

The master EMU also monitors the state of both array controllers. Should the EMU detect
an array controller fault it can:
•
Sound the audible alarm
•
Cause the EMU system fault status LED to flash
•
Display an array controller fault code on the blower LEDs when you momentarily
press the Alarm Control switch
When an error is detected on the EMU array controller communications path, it causes an
array controller fault.

1.3.2.3 I/O Module Status

The EMU also ensures that all six I/O modules are present, are properly installed, and that
each has TERMPOWER. If any of these conditions are not met, the EMU reports an error
condition to the array controller(s). The EMU also reports each I/O module type to the
array controller. Should an array controller determine that the I/O module configuration is
incorrect, it displays this information on the console.
An integrated circuit on each I/O module functions as an UltraSCSI bus extender. The
EMU and the array controller can enable or disable individual I/O module circuits,
thereby controlling individual external SCSI buses.

1.3.2.4 Enclosure Configuration Information

The EMU maintains the following configuration information:
•
Enclosure number
•
EMU microcode version
•
EMU message protocol version
•
PVA SCSI ID setting
•
Temperature sensor set points
•
The number of installed power supplies by location
•
The number of installed SBBs by location
•
The number of installed blowers by location
EK–SMCPR–UG. A01 387404-001
Chapter 1. Product Description
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