Add The Sc280 Expansion Enclosure To The A-Side Of The Chain; Add The Sc280 Expansion Enclosure To The B-Side Of The Chain - Dell SC4020 Deployment Manual

Add the SC280 Expansion Enclosure to the A-Side of the Chain

Connect the expansion enclosure to one side of the chain at a time to maintain drive availability.
1. Remove the A-side cable (shown in orange) that connects storage controller 1: port A to storage
controller 2: port B. The B-side cable continues to carry I/O while the A-side is disconnected.
Figure 137. Remove the A-Side Cable from the Storage Controllers
1. Storage system
3. Storage controller 2
2. Cable the expansion enclosure to the A-side of the chain.
a. Connect a SAS cable from storage controller 1: port A to the expansion enclosure: left EMM, port
C.
b. Connect a SAS cable from storage controller 2: port B to the expansion enclosure: left EMM, port
B.
Figure 138. Connect the A-Side Cables to the Expansion Enclosure
1. Storage system
3. Storage controller 2

Add the SC280 Expansion Enclosure to the B-Side of the Chain

Connect the expansion enclosure to one side of the chain at a time to maintain drive availability.
1. Remove the B-side cable (shown in blue) that connects storage controller 1: port B to storage
controller 2: port A. The A-side cables continue to carry I/O while the B-side is disconnected.
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2. Storage controller 1
2. Storage controller 1
4. Expansion enclosure
Adding or Removing an Expansion Enclosure