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