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### Array Details and Tray Reconfiguration

Caution - Before performing these reconfiguration procedures, ensure that you back up your data to tape or other media. See also To Restore Array Defaults Information.

The array details page that is shown after clicking the tray Name link from the Administration page (see To View Array Information) enables the admin user to view brief array status and also add expansion units to or remove expansion units from an array.

Note - A controller unit is usually defined as an expansion unit with a controller card. However, in the following procedures, an expansion unit is defined as a storage array tray with or without a controller card.

A wizard guides you (as the admin user or or in the admin role) through the expansion unit addition or removal.

See the following:

- Before You Begin
- Which Trays Can I Remove?
- To View Array Information
- To Add an Expansion Unit to an Array
- To Remove an Expansion Unit from an Array
- Restore Array Defaults Button (Clear Array Information)