90
One CE7922
Controller Tray or
CE7900 Controller
Tray and Five to
Eight DE6900 Drive
Trays with
Drive-Side Trunking
In the cabling configuration figure that follows, the controller tray is placed on top,
and the controllers are labeled as A and B. Because the DE6900 drive trays are very
heavy, they are installed starting at the bottom of the cabinet. The drive trays are
labeled from the bottom upward as 1, 2, 3, and so on.
NOTE The controller tray and the drive trays do not have to be stacked in this exact
order, and there is no requirement that you label the drive trays in this particular
sequence. Just make sure the DE6900 drive trays are at the bottom of the cabinet.
Use the configuration examples in this section as a guide to configure your storage
array to receive the benefits of drive-side trunking cabling. Drive-side trunking uses
the right side of the expansion ports on the rear of the drive trays to allow the full
bandwidth potential of the controller tray.
Drive-side trunking requires that the ESMs have four ports to support trunked
cascading connections to other drive trays. These cascading connections only apply
when eight DE6900 drive trays are connected to a single controller tray.
The figure in this section shows a representative configuration for connecting. Use
the tables in this section to see specific cabling patterns for other configurations.
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