Lenovo ThinkSystem DE Series Installation Instructions Manual page 27

Example B: A DE6000H controller shelf with
one DE120S/DE224 disk shelf in a standard
SAS configuration.
2. Power the drive shelves.
You need the following cables:

Confirm the drive shelf power switches are off.
a. Connect the two power cables for each shelf to different power distribution units (PDUs) in
the cabinet or rack.
b. If you have drive shelves, turn on their two power switches first. Wait 2 minutes before
applying power to the controller shelf.
c. Turn on the two power switches on the controller shelf.
d. Check the LEDs and seven-segment display on each controller.
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.
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a. Cable controller A to IOM A.
b. Cable controller B to IOM B.
Power cables