## Adding or removing physical drives in an existing configuration

You can add or remove physical drives (also called logical drive migration or LDM) to dynamically modify an existing array and its logical drives. To add physical drives, you might want to review the following information:

- Changing the RAID level of each logical drive in an array
- Increasing the array free space so you can create another logical drive in the array
- Increasing the logical drive space of each logical drive in the array
- Working with icons when adding a physical drive
- Recognizing the Custom configuration physical drive icons

  Note: The maximum number of physical drives you can have in an array is still limited by the controller stripe-unit size.

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