# Replacing physical drives in an array

If you have an array built with one or more physical drives that are not the same size, you can replace the smaller physical drives in the array with larger physical drives so that the array no longer has unusable capacity and an inefficient configuration.

Attention: During the rebuild operation, if another physical drive fails, there is the risk of losing data.

1. In the array object, click (online physical drive).
2. Set the drive state to defunct.
3. Replace the physical drive in the server or enclosure with a larger physical drive.
4. Wait for the rebuild to complete.
5. Repeat steps 1 through 4 until you have replaced all the smaller physical drives in the array.

## More information

- Example: Usable and unusable capacity
- Setting a drive state to defunct (action)

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