Adding a new storage controller to a running configuration using the CLI

You can add a new disk controller system to your SAN at any time using the command-line interface (CLI).

You must follow the zoning guidelines for your switch and also ensure that the controller is setup correctly for use with the SAN Volume Controller.

You must create one or more arrays on the new controller.

If your controller provides array partitioning, create a single partition from the entire capacity available in the array. You must record the LUN number that you assign to each partition. You must also follow the mapping guidelines (if your storage controller requires LUN mapping) to map the partitions or arrays to the SAN Volume Controller ports. You can determine the SAN Volume Controller ports by following the procedure for determining WWPNs.

Perform the following steps to add a new storage controller:

Issue the following CLI command to ensure that the cluster has detected the new storage (MDisks):
svctask detectmdisk
Determine the storage controller name to validate that this is the correct controller. The controller is automatically assigned a default name.
- If you are unsure which controller is presenting the MDisks, issue the following command to list the controllers:
```
svcinfo lscontroller
```
Find the new controller in the list. The new controller has the highest numbered default name.
Record the name of the controller and follow the instructions in the section about determining a disk controller system name.
Issue the following command to change the controller name to something that you can easily use to identify it:
```
svctask chcontroller -name newname oldname
```
Where newname is the name that you want to change the controller to and oldname is the name that you are changing.
Issue the following command to list the unmanaged MDisks:
```
svcinfo lsmdisk -filtervalue mode=unmanaged:controller_name=new_name
```
These MDisks should correspond with the RAID arrays or partitions that you have created.
Record the field controller LUN number. This number corresponds with the LUN number that you assigned to each of the arrays or partitions.
Create a new MDisk group and add only the RAID arrays that belong to the new controller to this MDisk group. To avoid mixing RAID types, create a new MDisk group for each set of RAID array types (for example, RAID-5, RAID-1). Give each MDisk group that you create a descriptive name. For example, if your controller is named FAST650-fred, and the MDisk group contains RAID-5 arrays, name the MDisk Group F600-fred-R5.
svctask mkmdiskgrp -ext 16 -name mdisk_grp_name -mdisk colon separated list of RAID-x mdisks returned in step 4
This creates a new MDisk group with an extent size of 16MB.