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# z/OS unmap from the Volumes (Storage Groups) list view

Unisphere supports the unmapping of volumes.

## Prerequisites

Before making any mapping changes to an existing CU image, ensure that all the devices in the CU are offline (the status of the CU should be offline).

See Roles and associated permissions to determine the user roles that can perform this task.

## About this task

To unmap a CU image (from the Volumes (Storage Groups) list view):

## Steps

1. Select the storage system.
2. Select Hosts > Mainframe.
3. In the CKD Storage Groups panel, click View All Storage Groups to open the Storage Groups list view.
4. Select the storage group and click to see its details. Click the number in the Number of Volumes field to open the Volumes (Storage Groups) list view.
5. Select one or more volumes to map, click and then click z/OS Unmap.
   The Mainframe Volumes Mapping dialog box displays.
6. Click Yes to the warning dialog box.
   The Mainframe Volumes Unmapping dialog box displays a summary of the unmap operation.
7. 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.