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Connecting Expansion Units
The ES NAS Series offers the expansion enclosures for expanding the storage system beyond the internal
drive count of the base enclosure. There are two models of expansions to choose from: the EJ1600
and the EJ1602. These expansions connect to the ES NAS system through the 12 or 6 Gbps SAS
expansion ports (depending on the base enclosure model) on the Storage Controller.
The following figure is an example of the storage system ES1640dc and expansion enclosure EJ1600:
Expansion
IN PORT OUT PORT
As shown in the above figure, the cabling method used to connect expansion units creates a redundant-
cross loop configuration. This provides the expansion units with redundant paths to the base ES NAS.
Moreover, system failover protection includes protection of JBOD connection failure to provide an extra
layer of protection. (Please refer to the High Availability app of QES.) With these two protection
Expansion
IN PORT OUT PORT
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