Figure 25 Example of separating drive-only racks
Separated rack configuration
In a dual-controller configuration, you can separate the rack that contains a
controller from a rack that a contains drive chassis, as well as separate two
racks that contain drive chassis only. This configuration combines both
options described in the previous two examples.
The following figure shows a dual-controller configuration with extended SAS
optical cabling between rack “R0” containing the primary controller and rack
“R1” containing two drive chassis, as well as between rack “L0” containing
the secondary controller and rack “L1” containing two drive chassis. The
Configurator includes additional side panels as required.
While not shown in the following figure, the configuration can include an "R2"
rack directly connected to, or separated from the "R1" rack. Similarly, the
configuration can include an "L2" rack directly connecting to, or separating
from, the "L1" rack.
To avoid I/O latency issues, the sum of the length of all cables (controller-to-
drive chassis cable and drive chassis-to-drive chassis cables) may not exceed
125 meters. The Configurator prevents you from selecting cabling that
exceeds this length.
100
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Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide
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