b In the Storage tab navigation pane, select the Disks node.c Click Manage Unassigned Disks.The Manage Unassigned Disks dialog box opens.d From the Disk Folder drop-down menu, select the drive folder for the unassigned drives.e Select Perform RAID rebalance immediately.f Click OK.6 Label the new back-end cables.Check the Drive CountDetermine the number of drives that are currently accessible to the Storage Center.1 Use Storage Manager to connect to the Storage Center.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 an expansion enclosure to the storagesystem.Add an SCv300 and SCv320 Expansion Enclosure to the A-Side of the ChainConnect the expansion enclosure to one side of the chain at a time to maintain drive availability.1 Turn on the expansion enclosure being added. When the drives spin up, make sure that the front panel and power status LEDs shownormal operation.2 Disconnect the A-side cable (shown in orange) from the expansion enclosure: top EMM, port 2. The B-side cables continue to carryI/O while the A-side is disconnected.Figure 60. Disconnect A-Side Cable from the Existing Expansion Enclosure1 Storage system 2 Storage controller 13 Storage controller 2 4 Expansion enclosure 13 Use a new SAS cable to connect expansion enclosure 1: top EMM, port 2 to the new expansion enclosure (2): top EMM, port 1.4 Connect the A-side cable that was disconnected in step 2 to the new expansion enclosure (2): top EMM, port 2.Adding or Removing Expansion Enclosures 79
