Fujitsu ETERNUS DX100 S4 Design Manual page 175

5. Hardware Configurations
Configuration Schematics
SCU:
IOC:
EXP:
DE:
IOM:
HD-DE:
FEM:
MP:
PSU:
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
System Capacitor Unit
Backup power source in case of power outage
I/O Controller
Controller to control I/O
SAS Expander
Expander chip for SAS connections
Drive Enclosure
I/O Module
Unit that controls I/O between controllers and drives
High-density Drive Enclosure
Fan Expander Module
Cooling fan module that is installed in a high-density drive enclosure
Mid Plane
Board that is located between the front of the enclosure and the rear of the enclosure
(the controller (CM) or I/O module (IOM) side)
Power Supply Unit
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