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# Split storage groups

Storage groups are a collection of devices that are stored on the storage system. An application, a server, or a collection of servers use them.

## About this task

This procedure explains how to split cascaded storage groups on storage systems.

Unisphere supports the splitting of storage groups in two different ways:

- During the split operation, a specified child storage group is removed from the parent storage group. A new masking view is created on this child storage group with the same initiator groups and port groups of the parent storage group masking view.
- During the split operation, a new storage group with the user specified name is created. The user specified devices from the source stand-alone storage group are moved to the newly created storage group. A new masking view is created on the new storage group using the same initiator groups and port groups of the source stand-alone storage group masking view.

To split a storage group:

## Steps

1. Select the storage system.
2. Select STORAGE > Storage Groups.
3. Select the storage group, click , and click SG Maintenance > Split From.
4. Do one of the following:
   - When splitting a child storage group from its parent masking view and moving it to a stand-alone masking view, select a child storage group and specify a new masking view name.
   - When splitting a stand-alone storage group into two storage groups each with a masking view, specify a new storage group name, specify a new masking view name, and select the volumes that are added to the new storage group.
5. Do one of the following:
   - Click Run Now to perform the operation now.
   - Expand Run Now and click Add to Job List to add this task to the job list, from which you can schedule or run the task at your convenience. For more information, see Schedule jobs and Preview jobs.