Figure 108 Enclosure Connection Path (When Only One Controller Is Installed); Figure 109 Enclosure Connection Path (When Two Controllers Are Installed) - Fujitsu ETERNUS DX100 S4 Design Manual

5. 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 enclo-
sures (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 connection 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 108 Enclosure Connection Path (When Only One Controller Is Installed)

DI
DE #0A
DI (IN)
DE #0x
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 109 Enclosure Connection Path (When Two Controllers Are Installed)

DI DI (IN)
DE #0A
DI (IN) DI (OUT)
DE #0x
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
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DI
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