Appendix A Adding or Removing an Enclosure184 Storage Center SC8000 Controller Deployment GuideAdding SC200/220 EnclosuresUse caution when adding an enclosure to a live Storage Center system to preserve theintegrity of the existing data. This section describes two methods of adding enclosures: Create a new chain by adding enclosures to available ports on the controller’s IO cards.The current configuration is undisturbed. Creating a new chain is the safest way toincrease storage capacity. When you have multiple chains, you should have at least twoIO cards in each controller. Add an enclosure to an existing chain by failing over to one side of the chain and thenconnecting into the other side of the chain.Creating a New Chain of SC200/220 EnclosuresThis method is safe and non‐intrusive to the existing disks and chains. Figure 117 onpage 185 shows an example of adding a new chain using the following steps.1 If there is more than one enclosure in the new chain, cable the enclosures together first.Do not connect the chain to the controller yet. Connect the enclosures:a New Enclosure (3): top, port B → Next Enclosure (4): top, port A.b New Enclosure (3): bottom port B → Next Enclosure (4): bottom, port A.2 Turn on each of the enclosures being added. When the enclosures spin up, make surethat the front panel enclosure and power status LEDs show normal operation.3 Connect the Controller: slot 6, port 2 → Enclosure 3: top, port A.4 In the Storage Center System Manager, select Storage Management→ System→Setup→ Configure Local Ports.5 Make sure that: Slot and slot port (in this case, slot 6, port 2) are Up and the Purpose is set to back‐end. Target Count equals the number of added drives, demonstrating that the controllerrecognizes the new enclosures.6 In the Storage Manager System Tree, confirm the number of enclosures.7 Connect last Enclosure (4): bottom, port B → Controller: slot 6, port 4.8 Verify that the last enclosure has been added as described in steps 4 through 6.9 If there are no managed disks in this system, the System Manager does not assign anIndex number. If the system contains a managed disk in any enclosure, the SystemManager assigns an index number to the new enclosures.10 The Storage Center System Manager informs you that you have new, unassigned disks.from the Storage Management menu, select Disk→ Manage Unassigned Disks tomove them to the managed disk folder and add the space to the disk pool. For moreinformation, see the Storage Center System Manager Administrator’s Guide.11 To redistribute data across all drives, from the Storage Management menu, selectDisk→ Rebalance RAID.
