Figure 67. Connect B-Side Cables to the New Expansion Enclosure1 Storage system 2 Storage controller 13 Storage controller 2 4 Expansion enclosure 15 New expansion enclosure (2)Removing an Expansion Enclosure from a ChainCurrently in ServiceTo remove an expansion enclosure, you disconnect the expansion enclosure from one side of the chain at a time.About this taskDuring this process, one side of the chain is disconnected. The Storage Center directs all I/O to the other side of the chain, which remainsconnected.CAUTION: Make sure that your data is backed up before removing an expansion enclosure.Before physically removing an expansion enclosure, make sure that none of the drives in the expansion enclosure are managed by theStorage Center software.Steps1 Use Storage Manager to connect to the Storage Center.2 Use Storage Manager to release the drives in the expansion enclosure.3 Select the expansion enclosure to remove and click Remove Enclosure. The Remove Enclosure wizard starts.4 Confirm the details of your current installation and click Next to validate the cabling.5 Locate the expansion enclosure in the rack. Click Next.6 Disconnect the A-side chain.a Disconnect the A-side cables that connect the expansion enclosure to the storage system. Click Next.b Reconnect the A-side cables to exclude the expansion enclosure from the chain. Click Next to validate the cabling.7 Disconnect the B-side chain.a Disconnect the B-side cables that connect the expansion enclosure to the storage system. Click Next.Adding or Removing Expansion Enclosures 85
