Figure 79 Enclosure Connection Path (When Only One Controller Is Installed); Figure 80 Enclosure Connection Path (When Two Controllers Are Installed) - Fujitsu ETERNUS DX60 S4 Design Manual

3. Hardware Configurations
Configuration Schematics
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Enclosure Connection Path
In the ETERNUS DX, multiple paths are used to connect a controller enclosure (CE) to drive enclosures (DE).
A drive enclosure has two independent drive interface ports. Path redundancy is maintained by connecting the
drive enclosure to two controllers directly. This configuration allows operation to continue even if one of the con-
nection paths fails.
Connect the controller enclosure to the drive enclosure as the following figures show.
Connection paths are not duplicated when only one controller is installed.

Figure 79 Enclosure Connection Path (When Only One Controller Is Installed)

DI
DE#03
DI (IN)
DI (OUT)
DE#02
DI (IN)
DI (OUT)
DE#01
DI (IN)
DI (OUT)
CE
DI (OUT): Drive interface (OUT) port
DI (IN): Drive interface (IN) port

Figure 80 Enclosure Connection Path (When Two Controllers Are Installed)

DI DI (IN)
DE#03
DI (IN) DI (OUT)
DI (OUT) DI (IN)
DE#02
DI (IN) DI (OUT)
DI (OUT)
DI (IN)
DE#01
DI (IN)
DI (OUT) DI (OUT)
CE
DI (OUT): Drive interface (OUT) port
DI (IN): Drive interface (IN) port
FUJITSU Storage ETERNUS DX60 S4, ETERNUS DX60 S3 Hybrid Storage Systems Design Guide (Basic)
DI
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