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### To Remove an Expansion Unit from an Array

Caution - All data is lost when performing this procedure. Before performing these reconfiguration procedures, ensure that you back up your data to tape or other media. You might also wish to record your storage pool and volume configuration information.

Note - Depending on the current state of the selected array, the Add Expansion or Remove Expansion buttons might be disabled. For example, you cannot remove trays in a 2x2 configuration.

1. Click General at the Administration page (6300 series). For the 6100 series, click the Array and Action Selection at the Administration page.
2. Click the array Name link in the table in the Array Power Management and Array Reconfiguration section (6300 series). For the 6100 series, click the array Name link in the table under the Array Selection section.

The Array Details and Reconfiguration page is displayed.

3. Click the Remove Expansion button.

The Remove Expansion Unit wizard window is displayed.

- For a Sun StorEdge 6300 system, the wizard verifies the Reverse Address Resolution Protocol (RARP) service configuration and that the entry for the RARP service exists. It also shows the associated controller's media access control (MAC) address
- For a Sun StorEdge 6100 system, the wizard displays a message asking you to ensure that the RARP and controller MAC information is correct for your configuration

4. Click the Next button if the RARP information is correct.

Note - This step is no longer required for arrays which have been upgraded to controller firmware Version 3.1.

- The wizard detects if any active jobs are running.
- If active jobs are running, wait until the jobs are completed before you click the Next button.

Caution - You cannot cancel this operation if you click the Next button in this wizard window. Click Cancel to cancel the procedure.

5. Click the Next button.

This step begins the array "unconfiguration" procedure. The wizard shows the following operations being performed:

- Place any existing storage pools in the offline state
- Disable the tray alternate master controller and unconfigure the controller (if necessary; this step is skipped if the controller is already disabled or if the controller is the only controller, as in a 1x1 configuration)
- Reset labels (this action might take a few minutes; see also Restore Array Defaults Button (Clear Array Information))
- Shut down the array

When the operations are completed, the wizard instructs you to click Next to view a summary of instructions to physically remove the expansion units.

Note - The Sun StorEdge 6020 and 6100 Arrays System Manual contains more details about physically adding and removing expansion units and other array configuration changes. Please read the array configuration chapter in this manual before attempting this procedure. Note that the Sun StorEdge 6300 system does not allow access by telnet. The wizards described in this help perform the underlying software commands needed to add or remove expansion units.
Also, always remove expansion units in pairs. An array configuration should always contain two, four, or six expansion units.

The instructions shown in the wizard are as follows:

- Turn off power by pressing the power rocker switches on each array power and cooling unit (PCU)
- Remove all power cords from all enclosures in the original configuration
- Verify all LEDs are off before proceeding
- Disconnect loop card cables
- Move the controller board down to the next tray. For example, if the resulting configuration is 2x4, the boards should be in the first and third enclosure from the bottom.
- Remove the expansion unit.
- Connect the loop card, Ethernet, and host cables
- Connect power cords to all enclosures
- Power on the array
- Once the array is powered on and all LEDs are lighted, click the Next button to perform verification of the new configuration

6. Click the Next button when the array is powered on and all LEDs are lighted.

The wizard window refreshes as the array is detected. This process might take up to 20 minutes. If the wizard times out, re-check the array installation.

When the software detects the array, the wizard window displays a confirmation message that the array is available and shows a link to the Storage Automated Diagnostic Environment (6300 series only) software (if installed).

7. Click the Close Wizard button.
8. If desired, configure the array.

You might want to recreate storage pools, volumes, permissions, and other features. See the following:

- Configuring An Array
- Array Configuration