Deployment Guide

Figure 70. Cable the Expansion Enclosures Together
1. Expansion enclosure 1 2. Expansion enclosure 2
3. Repeat the previous steps to connect additional expansion enclosures to the chain.
Check the Current Disk Count before Adding Expansion Enclosures
Use the Dell Storage Manager Client to determine the number of drives that are currently accessible to the Storage Center.
1. Connect to the Storage Center using the Dell Storage Manager Client.
2. Select the Storage tab.
3. In the Storage tab navigation pane, select the Disks node.
4. On the Disks tab, record the number of drives that are accessible by the Storage Center.
Compare this value to the number of drives accessible by the Storage Center after adding expansion enclosures to the storage
system.
Add the SC100/SC120 Expansion Enclosures to the A-Side of the Chain
Connect the expansion enclosures 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 71. Remove the A-Side Cable from the Storage Controllers
1.
Storage system
2. Storage controller 1
3. Storage controller 2
2. Cable the expansion enclosures to the A-side of the chain.
a. Connect a SAS cable from storage controller 1: port A to the first expansion enclosure in the chain, top EMM, port A.
b. Connect a SAS cable from storage controller 2: port B to the last expansion enclosure in the chain, top EMM, port B.
Adding or Removing an Expansion Enclosure
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