Lenovo S2200 Product Manual page 13

Each expansion module has two 6 Gb SAS x4 ports (Mini-SAS SFF-8088 connectors) that are labelled IN
and OUT. These ports are used for connections to the S2000 and for daisy chaining the E1012 and
E1024 enclosures between each other. The expansion port on the S2200 controller is connected to the IN
port on the expansion module. The OUT port on the expansion module is connected to the IN port on the
expansion module in the adjacent enclosure, and so on.
The expansion connectivity topology for dual controller configurations is shown in the following figure. For
single controller configurations, only Controller A path is present.
Figure 7. Expansion connectivity topology
Lenovo Storage S2200 13