Maximum Configuration

SYSTEM OPERATION PANEL:

System operation panel

FE:

Frontend enclosure

SVC:

Service Controller

FRT:

Frontend Router

FPSU:

Frontend Enclosure Power Supply Unit

Power supply unit for frontend enclosures

FANU:

Fan Unit

Cooling fan unit

CE:

Controller enclosure

CM:

Controller Module

CA:

Channel Adapter

Host Interface

Memory:

System memory

DA:

Drive adapter

BBU:

Battery Backup Unit

Backup power source in case of power outage

BUD:

Bootup and Utility Device

• Backup area in case of power outage

• Storage area for firmware

SW:

Switch

PCI Express switch

IOC:

I/O Controller

Controller to control I/O

EXP:

SAS Expander

Expander chip for SAS connections

CPSU:

Controller Enclosure Power Supply Unit

Power supply unit for controller enclosures

PANEL:

Operation panel

DE:

Drive enclosure

IOM:

I/O Module

Unit that controls the I/O between controllers and drives

MP:

Mid Plane

Board located between the front of the enclosure (the drive side) and the rear of the enclosure (the controller [CM] or I/O module [IOM] side)

DPSU:

Drive Enclosure Power Supply Unit

Power supply unit for drive enclosures