# Adding drives to an existing array

Use this action to add physical drives to an existing array without changing the RAID level.

When you create an array, it is striped across all the physical drives used by the array. To increase the size of an existing array, you add segments to the array, which can be on the same or different disks. Then, the ServeRAID Manager migrates the array such that the data is spread across the existing and new physical drives.

Notes:
  1. The capacity of the modified array must match or exceed its current capacity.
  2. The maximum size of an array is 2 terabytes (TB).
  3. This action is not supported for all RAID levels.

1. In the Logical devices view, click (array).
2. Right-click Expand or migrate array. The Configuration wizard opens with the "Choose RAID level" window.
3. Click Next. (Do not change the RAID level!) The "Modify array" window opens.
4. Add segments to the array. Optionally, click Advanced settings to set the drive capacity display units (MB, GB, TB).
5. When you are ready to continue, click Next. The "Configuration summary" window opens.
6. Review and apply your new configuration.

## More information

- Extending a partition on a logical drive

Glossary | Contents

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