RA7000 and ESA10000 Storage Subsystems
1–12
EK–SMCPP–UG. A01
When an error is detected on the EMU controller communications path, it causes
a controller fault.
1.3.2.2 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. The EMU also reports each I/O module type to
the controller. Should the 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 controller can enable or disable individual I/O
module circuits, thereby controlling individual external SCSI buses.
1.3.2.3 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
