Figure 24 Example of a dual-controller configuration with extended
cabling between racks
Separating drive-only racks
With either a single- or dual-controller configuration, you can separate the
rack containing a controller from a rack with a drive chassis. You can also
separate two racks containing only drive chassis. By specifying in the
Configurator the racks are not physically attached to each other, the
Configurator prompts you to specify the length of the SAS optical cable
connecting the two racks.
SAS optical cable length options are:
• 5 meters (DKC-F810I-FC5)
• 30 meters (DKC-F810I-FC30)
• 100 meters (DKC-F810I-FC1J)
The following figure shows a single-controller configuration, with extended
cabling between rack “R0” (containing the primary controller and two drive
chassis) and rack “R1” (containing two drive chassis). In addition, extended
cabling between racks “R1” and “R2" is available. The Configurator includes
additional side panels as required.
While not shown in the following figure, extending the cabling between racks
in a dual-controller configuration is also supported.
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) cannot exceed
125 meters. The Configurator prevents you from selecting cabling that
exceeds this length.
The following example shows a configuration of a controller controlling six
drive chassis, the maximum supported by a controller. The sum of the cables
A + B + C + D + E + F must be less than or equal to 125 meters.
Site preparation 99
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide
To Next Page
Loading...
