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One CE7922
Controller Tray or
CE7900 Controller
Tray and One to
Four DE6900 Drive
Trays with Trunking
In the figures that follow, the controller tray is shown 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 CE7900 controller tray and the DE6900 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 connection. 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 CE7900 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.
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