IBM Midrange System DS4000 Series Hardware Manual page 191

Setting Enclosure Order
Verify that the enclosures in the right half of the window reflect your actual physical layout.
This ensures that you do not perform maintenance activities in the wrong enclosure. If the
enclosures are listed in an incorrect order, select Storage Subsystem  Change 
Enclosure Order, as shown in Figure 4-36.
Figure 4-36 Change the enclosure order
Now you can sort the enclosures according to your site setup, as shown in Figure 4-37.
Figure 4-37 Changing the enclosure order
Manage Enclosure Alarm
Enclosure alarms can be managed from the Storage Manager subsystem window. This is
done by selecting Storage Subsystem  Manage Enclosure Alarms.
Note: This option is not available with all storage subsystem models.
173
Chapter 4. IBM System Storage DS planning and configuration