Dual domain—alternative cabling
This example illustrates cabling for a dual-domain configuration in a pattern that offers a balance
of fault tolerance and performance. In this configuration, note the following:
•
A multi-port, dual-domain controller in the host and dual-port disk drives in the disk enclosure
are required for dual-domain deployments.
•
Cables from each I/O module in the disk enclosure to the server or controller enclosure and
to additional cascaded disk enclosures provide dual-domain connectivity.
•
The crossing of the cables between each disk enclosure offers both good fault tolerance
and good performance, but may be confusing to implement and maintain.
•
This example illustrates using a Small Form Factor disk enclosure with one additional
cascaded disk enclosure. When using Large Form Factor disk enclosures, more than one
additional disk enclosure can be cascaded. For more information, see the QuickSpecs for
the Large Form Factor disk enclosure.
IMPORTANT:
This cabling scheme is supported for use only when the disk enclosure is
connected to a Smart Array controller.
1.
Host (server or controller enclosure)
2.
Primary disk enclosure
3.
Cascaded disk enclosure
4.
Primary path
5.
Additional path
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Cabling examples
