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Oracle® ZFS Storage Appliance Customer Service Manual
For ZS3-x, 7x20 Controllers, and DE2-24, Sun Disk Shelves
The ZS3-2 controller connects to external storage through a 4-port (4x4) SAS-2 HBA. You can attach from one to eight HDD-only or SSD/HDD Logzilla-capable disk shelves to the controller. You can also attach mixed disk shelf types (DE2 family and legacy Sun Disk Shelves) behind the same controllers, but each chain must contain only the same disk shelf type. Directly connecting different disk shelf types is not supported. For more information, see Connecting to Attached Storage. See also Disk Shelf Overview for component specifications and diagrams.