Chapter 1 Hardware Configurations
1.3 Enclosure Connection Path
ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Site Planning-
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Copyright 2011 FUJITSU LIMITED
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1.2.2
Power Supply Units
The power supply unit transforms input AC power from a power socket to DC power and supplies
power to each component. Two power supply units are installed in each drive enclosure.
Each power supply unit contains fans.
1.3
Enclosure Connection Path
For a dual-controller type, a controller enclosure (CE) is connected to drive enclosures (DE) with
multiple paths.
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.
Up to nine drive enclosures can be connected to a controller enclosure as shown in the figures
below.
Figure 1.21 Enclosure connection path (dual-controller type)
DI
DI
DE #02
DI
DI
DE #01
DI
DI
DE #09
DE #0x
DI
DI
CE
DI: Drive interface port
DI
DI
DI
DI
