Hitachi Virtual Storage Platform G1000 Hardware Manual page 117

Figure 33 Example of a default rack placement
Separated controller configuration
When designing a two controller VSP G1000 or VSP G1500 system, the
default system configuration includes a primary and secondary controller
chassis and each controller chassis is installed in a separate rack. This
specific layout is referred to as a Twin Controller configuration and the racks
are connected to each other.
For flexibility in placing the system in a data center, the rack containing the
primary controller can be separated from the rack containing the secondary
controller. The cable length options to connect the two controllers are 5
meters (standard length), 30 meters, and 100 meters. To avoid single points
of failure, data and power cables can be connected to the controllers in a
redundant configuration. Redundant configurations require that all cables to
be the same length.
The following figure shows a two controller configuration with extended
cabling between the racks containing the two controllers.
Cable connection guidelines 117
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide