NEC Storage Manager User Manual page 24

Chapter 1 Storage Overview
<Components>
Disk array components are shown below.
Component (Abbreviation)
Disk Array Controller
(DAC)
Table 1-1 Component List (1/2)
Configuration Devices
(Abbreviation)
Host Director (HD)
Replication Director (RD)
Disk Director (DD)
Cache Module Card (CHE)
Service Processor Card (SVP)
Temperature Alarm
(DAC_TEMP_ALM)
Panel
(PANEL)
Fan
(DAC_FANU/FANL)
Power Supply
(DAC_PS)
Battery Backup Unit
(DAC_BBU)
Basic Cabinet Junction Box
(BC_JB)
Back Board
(DAC_BB)
Power Control Card (PCC)
I-16
Description
Host interface control and cache module
control device. One to four ports are
mounted in single director.
Control part of DynamicDataReplication and
RemoteDataReplication function. Two ports
are mounted in single director.
Disk array control device. Four ports are
mounted in single director.
Cache memory
Processing part that provides various interfaces
(maintenance PC, Ether, modem, SCBI) to
perform power supply control and
maintenance.
Temperature abnormality detection part with
temperature sensor, in DAC (Disk Array
Controller).
External panel composed of status display part
of disk array, and system power on/off
switches.
Cooling fan to maintain the constant
temperature inside of the controller. There
are two types: Upper and Lower.
Power supply part in DAC.
Power supply part to hold data of cache
module in DAC.
Connection part of AC power cable in the
basic cabinet. It supplies electric power for
components (configuration devices) of cabinet.
Back board connecting each component
(configuration devices) in DAC.
Power control part.