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# Change volume configuration

A storage volume is an identifiable unit of data storage. Storage groups are sets of volumes.

## Prerequisites

- When adding DRV attributes, volumes must be unmapped.
- Full swap operations require the R1 and R2 devices to be the same size.
- Only the head of a metavolume can have its type changed. The metamembers automatically apply the changes.
- You cannot convert one member of a RAID set to unprotected without converting all the members to unprotected.
- When adding or removing SRDF attributes, there are no restrictions on I/O. The SRDF pair must be split or failed over. If failed over, the R1 device must be unmapped.
- When adding or removing BCV attributes, there are no restrictions on I/O. The standard or BCV pair must be split.

## About this task

This procedure explains how to change a volume's configuration.

## Steps

1. Select the storage system.
2. Select STORAGE > Volumes.
3. Browse to the volume.
4. Select the volume, click , and click Configuration > Change Volume Configuration.
5. Select a New Configuration for the selected volumes. Only valid configurations are listed. The remaining fields in the dialog box are active or inactive depending on the configuration type.
6. z/OS Only: Type the SSID for the new volume that is created by removing a mirror, or click Select... to open a dialog from which you can select an SSID.
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.