Complete Storage System Setup And Configuration; Cable The Data Hosts; Direct-Attach Topology - Lenovo ThinkSystem DE Series Installation Instructions Manual

During boot, the seven-segment display shows the repeating sequence of OS, Sd, blank to
indicate the controller is performing start-of-day processing. After the controller has booted
up, the shelf ID is displayed.
Example: Power connections are on the rear of the shelf.

3.4. Complete storage system setup and configuration

Follow this procedure to cable the controllers to your network, and then
complete storage system setup and configuration.

3.4.1. Cable the data hosts

Cable the system according to your network topology.

Direct-attach topology

The following example shows cabling to the data hosts using a direct-attach topology.
Example A: Direct-attach topology
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1. Connect each host adapter directly to the
host ports on the controllers.