Adding an enclosure to increase the size of the system

You can add an enclosure to the system using the CLI or management GUI. An enclosure can be added to the system if the enclosure previously failed and is being replaced with a new enclosure or if a repair action has caused the enclosure to be unrecognizable by the system. Adding an enclosure to the system increases the capacity of the entire system.

You can use either the management GUI or the command-line interface to add an enclosure to the system. If you are adding an enclosure that was previously removed from a system ensure that these conditions have been met:

All hosts that accessed the removed enclosure through its WWPNs have been reconfigured to use the WWPN for the new enclosure or to no longer access the enclosure. Failure to do so can result in data corruption.
Ensure that the system ID is reset on the new control enclosure. You can use either the command-line interface or the Service Assistant to verify the system ID on the new control enclosure
To use the command-line interface, enter the following command:
```
chvpd -resetclusterid
```
To use the Service Assistant, complete the following steps:
- Connect to the service assistant on either of the nodes in the control enclosure.
- Select Configure Enclosure.
- Select the Reset the system ID option. Do not make any other changes on the panel.
- Click Modify to make the changes.

After the new enclosure has been zoned and cabled correctly to the existing system, you can use either the addcontrolenclosure command or the Add Enclosure wizard in the management GUI. To access the Add Enclosure wizard, select Monitoring > System. On the image, click the new enclosure to launch the wizard. Complete the wizard and verify the new node. If the new enclosure is not displayed in the image, it indicates a potential cabling issue. Check the installation information to ensure your enclosure was cabled correctly.

Complete these steps to add an enclosure to the system using the command-line interface:

Using the sainfo lsservicestatus command (on the service CLI of the new enclosure), record the WWNN of the new enclosure.
Record the serial number of the enclosure which is needed in later steps.

Enter the following command to verify that the enclosure is detected on the fabric:

# svcinfo lscontrolenclosurecandidate
serial_number product_MTM
66G00C2       2076-124

Enter this command to determine the I/O group where the enclosure should be added:
```
lsiogrp
```
Record the name or ID of the first I/O group that has a node count of zero (0). You will need the ID for the next step.
Enter this command to add the enclosure to the system:
```
addcontrolenclosure  -iogrp iogrp_name | iogrp_id -sernum enclosureserialnumber
```
where iogrp_name | iogrp_id is the name or ID of the I/O group and enclosureserialnumber is the serial number of the enclosure.
Note: This step might take a considerable amount of time.
Record this information for future reference:
- Serial number.
- Worldwide node name of both node canisters.
- All of the worldwide port names.
- The name or ID of the I/O group that contains the enclosure.
Enter this command to verify that the node canisters in the enclosure are online:
```
lsnodecanister
```