NetApp EF Series - Figure 63) EF570 Expansion-Drive Shelf Cabling Example for Maximum DE224 C Shelf Configuration; Figure 64) EF570 with Mixed 6 Gbps and 12 Gbps Expansion Shelves; Greenfield Installation

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Introduction to NetApp EF570 All-Flash Arrays:
Feature Overview with SANtricity 11.50.2
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6.3 Greenfield Installation
EF570 storage systems use a single-stack method where both controllers have a 12Gbps SAS path to
both the expansion port 1 and expansion port 2 paths, as shown in Figure 63.
Figure 63) EF570 expansion-drive shelf cabling example for maximum DE224C shelf configuration.
For optimal performance, SAS 2 and SAS 3 drive shelves should be isolated into different storage
systems. If you decide to combine SAS 2 and SAS 3 shelves on the same EF570, use the double-stack
cabling method shown in Figure 64.
Figure 64) EF570 with mixed 6Gbps and 12Gbps expansion shelves.